The first version of my Cam Lever wasn't large enough, or strong enough.

However, sizing it up was easy, and with the help of some print-on supports, the whole thing prints in one piece, without supports. Hooray!

I also made a variation that uses a keyblade handle instead of a lever.
https://www.thingiverse.com/thing:5516126

https://www.thingiverse.com/thing:5523470