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For the 4 flexible joints (Part 7 - Palmar Digital), I read your comments that the hollow cylindrical part is inserted into the hand body, but should the part be inserted with the groove facing the palm or the back of the hand? The flexible joint middle has a flatter side and a grooved side - I have assumed the groove is to be towards the palm to help flexing? I did wonder if this part was reversed, it would keep the fingers more straight as the expense of requiring more force to close the hand.

The model is fantastic and is about the same size as my own hands. Printing at 0.1mm layer height on a Prusa i3 MK3 with SUNLU PLA+ and the quality is amazing. Will post a make once everything is finished.

Thanks for sharing.