TRY THIS OUT! It lets you do modelling and stress & thermal analysis. And it's FREE for hobbyists! http://www.design-engineering.com/autodesk-updates-fusion-360-136974/ https://www.google.com/search?q=fusion360+modeling&tbm=isch http://www.autodesk.com/products/fusion-360/overview But Linux isn't supported. :( And it doesn't work at all in WINE either. https://appdb.winehq.org/objectManager.php?sClass=version&iId=33392