@nprofile1q... Thanks! I wasn't sure if the brake mechanism would work (if the PLA would transmit enough pressure to the poles in that shape without snapping), but it worked perfectly on the first try!
It's all totally custom. I used FreeCAD for the design. Has something like 10 different parts. One of my more complicated designs lately.
The stupid heating element is like .... a couple cm too wide to fit in the cooler, so I have to mount it at a weird angle to get it to fit. And it has have freedom to move a bit to keep from burning the mash, so the weird-ass angled mount also allows a rocking motion. Had to print NPTS-compatible pipe threads to attach to the heater correctly. The list goes on ... This project had a lot of annoying constraints, but I'm pretty happy with the result so far. =)