Lately I’ve been sculpting an awful lot (since I updated Hexagon to version 2.5) and had made some rather nice pozidrive screwheads for a muzzle. Unfortunately the minimum prim size left them about 10mm across which was just too wide so I had to extend the actual threaded part to compensate. This made the screw heads the right size but the threaded part was far too long.
After a lot of searching I found a simple, free way (the only software specifically for doing this is 2900L$ O_o) of shrinking any sculpted prim to any size!
Follow this link to learn how: