I haven't read through the entire thread but from the first few pages and jumping around on it, it looks like you guys are looking for references for mechanisms and such. Is this still the case? I came across this thread while trying to figure out if I could use Solidworks to model parts for mods. (The answer is still unclear but I'm leaning toward no.) Anyway, my whole desire to do mods was that I thought it would be cool to make mods that had cool moving bits. Well, since I know more about cool moving bits than how to make mods, I figured I'd offer to help make some. My background is in mechanical engineering and I currently work in automotive but I worked briefly in aerospace.