Hi vblanco, it’s nice to find some help on this but i don’t see what i need to change as that looks like the original python section
eg
# Every bone that has a name starting with "DEF-" make deforming. All the
# others make non-deforming.
for bone in bones:
if obj.data.bones[bone].name.startswith(DEF_PREFIX):
obj.data.bones[bone].use_deform = True
else:
obj.data.bones[bone].use_deform = False
if i export with the option ticked i still get ca 150 bones !!! i must be doing something wrong