I print with 0.6mm nozzle, wall thickness 4perimeters, bottom layers thickness 4, top layers 4layers, 25% grid infill, PLA or better PETG material, I print it standing up without supports. Variable layer height is recommended, where rounds are inserted (in tray) print as low layer lines You can (I printed 0,35 height for prototipes and it worked just fine, but bigger layer lines will be more abrasive on loading handle).