I get a lot of second-hand Bionicle stuff, so there is bound to be broken parts occasionally. The furthest I go with modification is sanding down the broken edges of parts. I have no idea what I'll do with them, but if I ever need a Metru red Toa lower leg minus the ball at the end or a similarly modified/broken Kohrok leg, I know where to look. Now, I really need to get my hands on a few Volitaks for Nidhiki and pretty much everyone else who wears them bar Nuparu Mahri. Eventually, I'll have a pile of Volitak pipe connectors ready to attach to, um, stuff.