If ABing is it possible to slightly change poses..? (Moving an arm or twisting the wrist, etc)

yes

Is clothing apart of the YCH? SORRY! Been stalking you for a minute and trying to decide if I should hold out. ;]

If you're talking about maid’s clothes, you can certainly replace them with the one you like more.

THis was about about the knee-up pose -- I have a character I think is perfect for you. ^^