diff -N ecal_vacuum_flange_simple_v2.gdml
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ ecal_vacuum_flange_simple_v2.gdml	12 Jul 2013 18:30:15 -0000	1.1
@@ -0,0 +1,183 @@

+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<!-- 
+  ECal vacuum flange based on manufacturing drawings from Stepan.
+  @author Sho Uemura <[log in to unmask]>
+  @version $Id: ecal_vacuum_flange_simple_v2.gdml,v 1.1 2013/07/12 18:30:15 meeg Exp $
+-->
+<gdml xmlns:gdml="http://cern.ch/2001/Schemas/GDML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.lcsim.org/schemas/gdml/1.0/gdml.xsd" >
+
+    <define/>
+
+    <materials>
+        <material Z="1" name="G4_Galactic" state="gas">
+            <T unit="K" value="2.73"/>
+            <P unit="pascal" value="3e-18"/>
+            <!-- <MEE unit="eV" value="21.8"/> -->
+            <D unit="g/cm3" value="1e-25"/>
+            <atom unit="g/mole" value="1.01"/>
+        </material>
+        <material Z="13" formula=" " name="Aluminum" >
+            <D value="2.7" />
+            <atom value="26.9815" />
+        </material>    
+    </materials>
+
+    <solids>
+        <box lunit="mm" name="front_flange_box" x="768.35" y="457.2" z="20"/>
+        <box lunit="mm" name="back_flange_box" x="505" y="160" z="20"/>
+        <trap name="chamber_base_trap" aunit="deg" lunit="mm" z="450" theta="1.864" phi="0" y1="28" x1="377" x2="377" alpha1="0"
+              y2="28" x3="406.29" x4="406.29" alpha2="0"/>
+
+        <box lunit="mm" name="chamber_cutaway_box" x="500" y="10" z="265"/>
+
+        <subtraction name="chamber_base_1">
+            <first ref="chamber_base_trap"/>
+            <second ref="chamber_cutaway_box"/>
+            <position name="chamber_base_pos" unit="mm" x="0" y="16" z="-72.5"/>
+        </subtraction>
+        <subtraction name="chamber_base">
+            <first ref="chamber_base_1"/>
+            <second ref="chamber_cutaway_box"/>
+            <position name="chamber_base_pos" unit="mm" x="0" y="-16" z="-72.5"/>
+        </subtraction>
+
+        <union name="ecal_flange_1">
+            <first ref="front_flange_box"/>
+            <second ref="chamber_base"/>
+            <position name="chamber_base_pos" unit="mm" x="140.828" y="0" z="215"/>
+        </union>
+        <union name="ecal_flange_2">
+            <first ref="ecal_flange_1"/>
+            <second ref="back_flange_box"/>
+            <position name="back_flange_box_pos" unit="mm" x="147.505" y="0" z="430"/>
+        </union>
+
+
+        <eltube name="photontube_outside" lunit="mm" dx="17" dy="17" dz="235"/>
+        
+        <union name="flange_with_photontube">
+            <first ref="ecal_flange_2"/>
+            <second ref="photontube_outside"/>
+            <position name="photontube_outside_pos" unit="mm" x="-26.569" y="0" z="215"/>
+            <rotation name="photontube_outside_rot" unit="deg" x="0" y="-1.748" z="0"/>
+        </union>
+        <box lunit="mm" name="photontube_cutaway_box" x="75" y="10" z="145"/>
+        <subtraction name="flange_with_photontube_trim1">
+            <first ref="flange_with_photontube"/>
+            <second ref="photontube_cutaway_box"/>
+            <position name="photontube_trim1_pos" unit="mm" x="-26.569" y="19" z="347.5"/>
+        </subtraction>
+        <subtraction name="flange_with_photontube_trim2">
+            <first ref="flange_with_photontube_trim1"/>
+            <second ref="photontube_cutaway_box"/>
+            <position name="photontube_trim1_pos" unit="mm" x="-26.569" y="-19" z="347.5"/>
+        </subtraction>
+
+
+        <trap name="egap_outside_trap_upper" aunit="deg" lunit="mm" z="450" theta="4.796" phi="0" y1="32.33" x1="106.962" x2="52.344" alpha1="-0.269"
+              y2="32.33" x3="167.411" x4="112.843" alpha2="-0.269"/>
+        <trap name="egap_outside_trap_lower" aunit="deg" lunit="mm" z="450" theta="4.796" phi="0" y1="32.33" x2="106.962" x1="52.344" alpha1="0.269"
+              y2="32.33" x4="167.411" x3="112.843" alpha2="0.269"/>
+        <union name="egap_outside">
+            <first ref="egap_outside_trap_upper"/>
+            <second ref="egap_outside_trap_lower"/>
+            <position name="egap_outside_trap_pos" unit="mm" x="0" y="-32.33" z="0"/>
+        </union>
+        <subtraction name="egap_outside_trim1">
+            <first ref="egap_outside"/>
+            <second ref="chamber_cutaway_box"/>
+            <position name="egap_trim1_pos" unit="mm" x="0" y="18.165" z="-72.5"/>
+        </subtraction>
+        <subtraction name="egap_outside_trim2">
+            <first ref="egap_outside_trim1"/>
+            <second ref="chamber_cutaway_box"/>
+            <position name="egap_trim2_pos" unit="mm" x="0" y="-50.495" z="-72.5"/>
+        </subtraction>                
+        
+        <union name="flange_outside">
+            <first ref="flange_with_photontube_trim2"/>
+            <second ref="egap_outside_trim2"/>
+            <position name="egap_outside_pos" unit="mm" x="63.810" y="16.165" z="215"/>
+        </union>
+
+
+        <subtraction name="flange_outside_trim1">
+            <first ref="flange_outside"/>
+            <second ref="front_flange_box"/>
+            <position name="outside_trim1_pos" unit="mm" x="0" y="0" z="-20"/>
+        </subtraction>
+        <subtraction name="flange_outside_trim2">
+            <first ref="flange_outside_trim1"/>
+            <second ref="front_flange_box"/>
+            <position name="outside_trim2_pos" unit="mm" x="0" y="0" z="450"/>
+        </subtraction>
+
+
+        <eltube name="photontube_inside" lunit="mm" dx="11" dy="11" dz="235"/>
+
+        <subtraction name="flange_minus_photontube">
+            <first ref="flange_outside_trim2"/>
+            <second ref="photontube_inside"/>
+            <position name="photontube_inside_pos" unit="mm" x="-26.569" y="0" z="215"/>
+            <rotation name="photontube_inside_rot" unit="deg" x="0" y="-1.748" z="0"/>
+        </subtraction>
+        
+        
+        <trap name="chamber_inside_trap" aunit="deg" lunit="mm" z="450" theta="0.988" phi="0" y1="16" x1="331.676" x2="331.676" alpha1="0"
+              y2="16" x3="374.667" x4="374.667" alpha2="0"/>
+
+        <subtraction name="flange_minus_inside">
+            <first ref="flange_minus_photontube"/>
+            <second ref="chamber_inside_trap"/>
+            <position name="flange_inside_pos" unit="mm" x="150.017" y="0" z="215"/>
+        </subtraction>
+
+
+        <trap name="egap_inside_trap" aunit="deg" lunit="mm" z="450" theta="4.796" phi="0" y1="52.66" x1="26.355" x2="26.355" alpha1="0"
+              y2="52.66" x3="86.854" x4="86.854" alpha2="0"/>
+
+        <subtraction name="flange_minus_egapinside">
+            <first ref="flange_minus_inside"/>
+            <second ref="egap_inside_trap"/>
+            <position name="egap_inside_pos" unit="mm" x="62.723" y="0" z="215"/>
+        </subtraction>
+
+
+        <eltube name="egap_inside_tube" lunit="mm" dx="26.33" dy="26.33" dz="240"/>
+
+        <subtraction name="flange_minus_egap_left">
+            <first ref="flange_minus_egapinside"/>
+            <second ref="egap_inside_tube"/>
+            <position name="egap_inside_left_pos" unit="mm" x="34.4205" y="0" z="215"/>
+            <rotation name="egap_inside_left_rot" unit="deg" x="0" y="0.956" z="0"/>
+        </subtraction>
+        <subtraction name="flange_minus_egap_right">
+            <first ref="flange_minus_egap_left"/>
+            <second ref="egap_inside_tube"/>
+            <position name="egap_inside_right_pos" unit="mm" x="91.025" y="0" z="215"/>
+            <rotation name="egap_inside_rightt_rot" unit="deg" x="0" y="8.594" z="0"/>
+        </subtraction>
+
+        <box lunit="mm" name="WorldBox" x="80000" y="80000" z="80000" /> 
+    </solids>
+
+    <structure>
+        <volume name="ecal_flange_vol">
+            <materialref ref="Aluminum"/>
+            <solidref ref="flange_minus_egap_right"/>
+        </volume>
+        <volume name="world_volume" > 
+            <materialref ref="G4_Galactic" /> 
+            <solidref ref="WorldBox" /> 
+            <physvol> 
+                <volumeref ref="ecal_flange_vol" /> 
+                <position name="ecal_flange_position" x="21.17" y="0" z="323.778" />      
+            </physvol> 
+        </volume> 
+    </structure>
+
+    <setup name="Default" version="1.0">
+        <world ref="world_volume"/>
+    </setup>
+
+</gdml>

diff -u -r1.4 -r1.5
--- ecal_vacuum_flange_simple.gdml	29 Jan 2013 23:22:05 -0000	1.4
+++ ecal_vacuum_flange_simple.gdml	12 Jul 2013 18:30:15 -0000	1.5
@@ -2,7 +2,7 @@

 <!-- 
   Tessellated solid for electron run vacuum flange, not tested.
   @author Sho Uemura <[log in to unmask]>

-  @version $Id: ecal_vacuum_flange_simple.gdml,v 1.4 2013/01/29 23:22:05 meeg Exp $

+  @version $Id: ecal_vacuum_flange_simple.gdml,v 1.5 2013/07/12 18:30:15 meeg Exp $

 -->
 <gdml xmlns:gdml="http://cern.ch/2001/Schemas/GDML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.lcsim.org/schemas/gdml/1.0/gdml.xsd" >
 

@@ -189,6 +189,10 @@

                 <volumeref ref="Bottom_front_flange_d_vol"/>
                 <position name="Bottom_front_flange_d_pos_2" unit="mm" x="0+flange_x" y="-119.8" z="-215+flange_z"/>
             </physvol>

+            <physvol name="Top_front_flange_d_phys">
+                <volumeref ref="Top_front_flange_d_vol"/>
+                <position name="Top_front_flange_d_pos_2" unit="mm" x="0+flange_x" y="119.8" z="-215+flange_z"/>
+            </physvol>

             <physvol name="Vacuum_tube_phys">
                 <volumeref ref="Vacuum_tube_vol"/>
                 <position name="Vacuum_tube_pos_2" unit="mm" x="-61.75+flange_x" y="0" z="0+flange_z"/>

@@ -213,10 +217,6 @@

                 <volumeref ref="QLeft_block1_cut_vol"/>
                 <position name="QLeft_block1_cut_pos_2" unit="mm" x="40.783+flange_x" y="0" z="0+flange_z"/>
             </physvol>

-            <physvol name="Top_front_flange_d_phys">
-                <volumeref ref="Top_front_flange_d_vol"/>
-                <position name="Top_front_flange_d_pos_2" unit="mm" x="0+flange_x" y="119.8" z="-215+flange_z"/>
-            </physvol>

             <physvol name="Top_side_plate_phys">
                 <volumeref ref="Top_side_plate_vol"/>
                 <position name="Top_side_plate_pos_2" unit="mm" x="-224.205+flange_x" y="9.5" z="0+flange_z"/>