When printing with polypropylene filament, the stage should be taped with packing tape or duct tape. The first prototyping deformed due to that the tape inflated and deformed after being heated up for extended time (around 2-3 hours). The printed handle somehow fits the jig. The way to avoid deformation might be to make an inentionaly suspended design, and print the support first with layers of e.g. PLA, and swith to PP to finish the rest of the support and the target item.