Anyone on here do 3D CAD and solid modeling? I started out on Solidworks at the beginning of the year. So far I love it and also working on my engineering degree. Any of you build your own little projects for fun? I've just finished a centrifugal supercharger and now working on multiple muffler designs that I will use on my 06 3 valve to test out and I've also modeled an AR-15 lower for my wife, did a skeltonized version for it. Should be nice when all done. Will take some time though. But I've taken a massive interest in mufflers and exhaust since I've been playing around with my 3 valves exhaust.