diff --git a/src/CAD_to_OpenMC/assembly.py b/src/CAD_to_OpenMC/assembly.py
index 8c404ea..e44a568 100644
--- a/src/CAD_to_OpenMC/assembly.py
+++ b/src/CAD_to_OpenMC/assembly.py
@@ -239,10 +239,10 @@ def run(
     ):
         """convenience function that assumes the stp_files field is set, etc and simply runs the mesher with the set options"""
         self.import_stp_files(**kwargs)
+        if imprint:
+            self.imprint_all()
         if merge:
             self.merge_all()
-        elif imprint:
-            self.imprint_all()
         self.solids_to_h5m(backend=backend, h5m_filename=h5m_filename, **kwargs)
 
     def import_stp_files(
@@ -969,7 +969,7 @@ def _merge_solids_full(self, solids, fuzzy_value=1e-6):
         """
         adds all solids on the solids-vector to the algorithm and
         merges them as arguments. This is stabler, but more resource
-        intesive
+        intensive
         """
         bldr = OCP.BOPAlgo.BOPAlgo_MakeConnected()
         for shape in solids:
diff --git a/src/CAD_to_OpenMC/assemblymesher_cq2.py b/src/CAD_to_OpenMC/assemblymesher_cq2.py
index 0e881ae..eff71f7 100644
--- a/src/CAD_to_OpenMC/assemblymesher_cq2.py
+++ b/src/CAD_to_OpenMC/assemblymesher_cq2.py
@@ -80,9 +80,9 @@ def generate_stls(self):
 
     @classmethod
     def surface_hash(self,surface):
-        part1=hash(surface)
-        part2=abs(hash(surface.Center().toTuple()))
-        return int(str(part1)+str(part2))
+        part1=surface
+        part2=surface.Center().toTuple()
+        return hash( (part1,part2) )
 
     def _mesh_surfaces(self):
         # loop over all surfaces in all entities
@@ -127,7 +127,7 @@ def _mesh_surfaces(self):
         return stls
 
     def _triangulate_solid(self, solid, tol: float = 1e-3, atol: float = 1e-1):
-        """ create a mesh /by means of the underlying OCCT IncrementalMesh
+        """ create a mesh by means of the underlying OCCT IncrementalMesh
             on a single solid. This will later be split into surfaces.
             This has to be done since otherwise a single solid can get leaky
             when surfaces do not connect