pollin vise improvement part

this part is for pollin's vise "Maschinen-Schraubstock PMS-65". this vise is a nice tinkering toy, as it's super cheap but still can be attached firmly to a professional drilling machine and has this nice quick-fit-mechanism. unfortunaly, this vise is unuseable out of the box, as the moving part wiggles around like hell...
so here's the quick and easy fix to this. just print this part and attach it to the bottom of the moveable part - and tadaa... this vise is really good ;-)