Would it be possible to make partial polymorphs? Ones that don't effect the entire body, that way you can still have some originality yet still change up your character. I was thinking about how Sotha Sil's arm is a clockwork prosthetic. I think that would be a fun clockworky change to a character without completely turning them into a factoum machine. I'm sure there are plenty of other options that would work well too. What are your thoughts? Are the character models limited from that level of alteration?