RE: Bulletproofing FunFactor
just remember its best to have flexy parts here and there, such as the arms, they allow flex and save damage further down the line. u cant make the whole truck completely solid - well, not really... better to have a couple of $5 bits break, than the whole chassis and diff cases etc taking the strain, imo
sounds like u are about there tho - the shafts, cups and chassis flex are the main issues, spur gears, if u are running uprated engines and/or running in sandy/stoney areas, are worth uprating too imo. so it looks like ur pretty much covered - theres tons of pics of mine about, and that has taken a couple of very hard 50mph-ish smashes with no real damage bar a broken jt shock tower and cosmetic stuff.
just keep an eye out for a jt racing chassis - they are brilliant... and oh so rare now it seems...