Hi Ben, your name is Ben, isnīt it? You have the same nickname on TC as far as i rememeber and we made a deal on some Egress parts many moons ago
As F1END said the metal Outdrives for at least the rear are a wise buy.
The dampers are rather expensive but without a doubt the best dampers Tamiya have ever released! With all these options it would have probably been cheaper to buy a 84100 DB01R. If you really go racing after a few months of practicing the Aeration dampers are a must in my opinion.