The front alloy bulkhead caps ( the shock tower screws to them ) have a habit of bending. I have had one bent on me and a freind has had both completly shear, although that by all acoounts was quite a hard head on hit.
He also snapped the chassis
Also have some spare bearings to hand. They do get rough after a while but I have cleaned mine out and re-oiled them and they are good again. Others have not been so lucky.