You designed a pestle hammer design, rather than a hammer. This does not provide the leverage hammers provide. Still, you did a great job going from your visualization to the final product. You have mad skills!!!
I got the last version of this tool, i was looking for reviews but is irrelevant now since the order arrived before i saw this video. Nobody has a review on the new version tho Edit:the standard size bit holder is still not on this version 🤦♂️