I realize this posting is from a few years back, but I found it to be a great amount of information. Since my carb knob was busted, I figured I’d post a link to a site that I uploaded a 3d printable version to. If you have any questions about it, let me know.
https://www.thingiverse.com/thing:4547373
Hopefully someone finds this handy in the future as it’s a pain to try and adjust the mixture screw and work the choke by hand. The knob does both at the same time.
