Grab some bearing carriers arms all round chassis top plate and steering linkage rod ends jump off the thread a lot when you tweak front end and servo saver jogs hard, I'd also carry back shock tower if your prone to coming down arse first.
Spare shock shafts are always good as 2wd are a nightmare for bending these on stiffer set ups, while your at it grab a spare diff assembly cuz if ure running beefy brushless these wear quickly even with uprated oil and loose seetings
Hope that helps
