This crank arm gives a little bit more room and power, especially useful while knitting with the ribber and more or thicker yarn.
I noticed while making a e-wrap selvedge that my old crank arm wasn't able to transmit more power evenly (!) to the cam shell, so I thought, maybe bigger is better in this case ;-).
To compensate its bigger size the counterweight box is also a bit larger.
I printed the handle with 35% infill and with support. See picture how to print best with least amount of support.
The arm works great in combination with my larger crank handle:
https://www.printables.com/de/model/653343-csm-larger-crank-handle-with-bearing-support
EDIT 18/12/23
Added some more screw holes to the lid to better lock it down, especially if you use some wadding to silence the BBs…
The author remixed this model.
Longer and curved arm with bigger weight for a little bit more Oomph!