Freecad is… rough. But, it has python API, and that’s what I ended up using for almost all my stuff (there also was a period of using cadquery, but installing it is a horrible pain, so I gve up).

Also using onshape every now and then, but many things are just too annoying to do with a gui.

Food grade stuff. Cookie cutters, spares for cat drinking fountain. I guess hardened could’ve worked too. Printed with ColorFabb HT, so it can just go to dishwasher.

Almost always 0.4 (sometimes 0.4 stainless). It is the biggest one that still gives me acceptable tolerances, and printing time is easier to deal with than imprecise parts.

Changing the nozzle and recalibrating feels like too much of a hassle for me, so I didn’t experiment much though.