If you're talking about silver can racing with a TT01, we have found that either the E or the regular TT works fine (in fact, we feel that the non-E motor mount which runs a little loose, actually make the car slightly faster), although the BB steering on the E is much better. We also like the TRF shocks, although the plastic ones (get the super mini ones) work OK for most racers. As you mentioned, bearings are a must. We also suggest the turnbuckle steering links (permits smoother suspension movement) and the aluminum driveshaft (the new one with the drive cups for each end is even better). As far as bodies go, yes even a small wing seems preferable to no wing at all. The 430 is a fine body as is the NSX and the Mercedes DTM, all with the kit wings work just fine. In fact, pretty much every body works well at silver can speeds.