Hello! Thanks for your question.
These buttons should only appear as a choice, and the images should not appear again in other parts of the game. Our main concern is that this can be abused to bypass the item/arm/head change limit.
I understand that this would make the game look a little more different, but on a personal account I’d go with text choices, and spend the time you would’ve used in drawing those images into adding extra detail to the sprite and background or the CG.