I originally built up my RB6.6 coming from the original RB6 and I expected rear grip to be something I would need to work on, especially with a laydown. I was also testing it against my Xray Xb2 CE with laydown and after a few weeks of testing the 6.6 at OCRC on Medium to High Grip Clay (Electrons) I find myself looking for a bit more steering as the rear is so locked in. I've since moved my shocks to the front of the arms and pushed my battery up a bit more. I've also taken the front bulkhead spacer down to 0.5mm instead of the 1.0mm spacer.
Jason and I plan to do some slick tire testing at SCVRC next week! Bring on the Primes and Panther slicks!