How do we handle obsolete official subparts?

[Michael Heidemann]

So far I have understand our procedure, we leave the parts where they are - parts\s - untouched. So any old model can load.

For backwards compatibility we avoid any change of orientation for parts. I assume that nobody uses a subpart in a model file, so if the calling part reflects the change of origin and stays the same for itself, I can not see at present any reason for not changing the origin of a subpart.

But i wonder why you want to change the orientation of a subpart. This does not make sense to me.