Just wanted everyone to see that it works. I'm turning the mech with a screw driver because I don't want a gear on bottom. Here is where the arm will sit so it has to be internal. From what I read we can change the torque by making the gear bigger for the string. So I've been adjusting in cad and will hopefully get a working string soon haha. I'm also editing to make the moving parts lighter so I can use a lighter spring that will be easier on the string pull. We'll keep trying! To bad Pete couldn't chime in . Anyway, while I'm waiting for a print and my frustration to calm down, I designed this in about 30minutes. (Wolf mine coming soon!) Just going to make the shell a little bit thicker for some room to carve the dimples into the shell.