diff --git a/chaudronnerie/CHO30.FCStd b/chaudronnerie/CHO30.FCStd
index a2c3b6e..100e13c 100644
Binary files a/chaudronnerie/CHO30.FCStd and b/chaudronnerie/CHO30.FCStd differ
diff --git a/tools/export-all-parts.py b/tools/export-all-parts.py
index 436b2fb..ca6c16a 100644
--- a/tools/export-all-parts.py
+++ b/tools/export-all-parts.py
@@ -1,15 +1,13 @@
-freecad_install_path = '/home/youen/dev/FreeCAD-asm3-Daily-Conda-Py3.10-20221128-glibc2.12-x86_64'
-
-import sys
-sys.path.insert(0,freecad_install_path + '/usr/lib')
-
 from pathlib import Path
+import os
 
 import FreeCAD as App
 import Import
+import ImportGui
 
-script_folder = os.path.dirname(__file__)
-project_folder = os.path.realpath(script_folder + '/..')
+#script_folder = os.path.dirname(__file__)
+#project_folder = os.path.realpath(script_folder + '/..')
+project_folder = os.getcwd()
 output_folder = project_folder + '-STEP'
 
 def convert_file(file_name, output_format):
@@ -64,6 +62,49 @@ def convert_file(file_name, output_format):
 	while len(FreeCAD.listDocuments().values()) > 0:
 		FreeCAD.closeDocument(list(FreeCAD.listDocuments().values())[0].Name)
 
+def convert_assembly(file_name, output_format):
+	print(file_name)
+
+	doc = App.open(project_folder + '/' + file_name)
+	
+	root_objects = []
+	main_object = None
+	
+	# remove all objects that are not visible, or not in the TypeId whitelist, because we don't want to export those
+	need_check_objects = True
+	while need_check_objects:
+		need_check_objects = False
+		for obj in doc.Objects:
+			if not obj.Visibility or obj.TypeId not in ['Part::Feature', 'Part::FeaturePython', 'PartDesign::Body', 'Part::Mirroring', 'Part::Cut', 'Part::Part2DObjectPython', 'Part::MultiFuse', 'Part::Loft', 'Part::Torus', 'Part::Cylinder', 'App::DocumentObjectGroup', 'App::Part', 'App::Link']:
+				#print('removing ' + obj.Name + ' ('+obj.Label+')')
+				doc.removeObject(obj.Name)
+				need_check_objects = True
+				break
+	
+	for obj in doc.Objects:
+		if len(obj.Parents) == 0:
+			#print(obj.Label)
+			root_objects.append(obj)
+			if obj.Label == doc.Name:
+				main_object = obj
+	
+	if main_object is None and len(root_objects) == 1:
+		main_object = root_objects[0]
+	
+	if main_object is None:
+		raise Exception("Can't find main assembly in file " + file_name + " (found " + str(len(root_objects)) + " root object(s), none named like the document " + doc.Name + ")")
+		
+	output_path = output_folder + '/' + os.path.dirname(file_name) + '/' + Path(file_name).stem + '.' + output_format
+	output_dir = os.path.dirname(output_path)
+	if not os.path.exists(output_dir):
+		os.makedirs(output_dir)
+	
+	ImportGui.export([main_object], output_path)
+	
+	# close all documents
+	while len(FreeCAD.listDocuments().values()) > 0:
+		FreeCAD.closeDocument(list(FreeCAD.listDocuments().values())[0].Name)
+
 folders = [
 	'chaudronnerie',
 	'tubes'
@@ -77,3 +118,8 @@ for folder in folders:
 		print(source_path)
 		convert_file(source_path, 'step')
 
+convert_assembly('vheliotech.FCStd', 'step')
+
+# exit FreeCAD
+FreeCADGui.getMainWindow().close()
+
diff --git a/tools/export-all-parts.sh b/tools/export-all-parts.sh
new file mode 100755
index 0000000..58b1494
--- /dev/null
+++ b/tools/export-all-parts.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd $SCRIPT_DIR/..
+~/dev/FreeCAD-asm3-Daily-Conda-Py3.10-20221128-glibc2.12-x86_64.AppImage tools/export-all-parts.py
diff --git a/vheliotech.FCStd b/vheliotech.FCStd
index 64174c9..390bdd0 100644
Binary files a/vheliotech.FCStd and b/vheliotech.FCStd differ