The pro one has stiffer ally braces, a 7075 chassis, better shocks, ally suspension holders,dual disc up front, hardened diffs,thicker shock towers, cvds up front and center, ally steering knuckles and is still very light. I think that you may have had a little bad luck cause even the rr version seems to hold up very well at our track and performs better than buggys that cost a lot more money. Get the pro cap ends ant get yourself some spare shock ends and you'll be fine.