I was reading that a few were having side bite problems. This is what we found running on cork flooring over last seasons winter indoor championship over here in the UK. the cork is a medium grip surface and the KF1 LG as it was back then suffered coming out of the corner. Everyone ran the rear pivots high on the rear wishbones, which helped with this problem. I also found although short wheelbase gave more straight line traction it gave more pendulum effect into the corner and made the side bite problem worse. Basically my conclusion was that the higher roll centre was sending the load down the wishbone faster ie like anti-squat rather than waiting for the springs to settle and transmit the load.
I recon the KF1 rear end would be better for loose grip with the alloy block kit in the high hole. At the Euros in the 4wd the winning Aero ran high pivot position with no spacers in the front and 2mm in the rear, that's one high position you probably carnt get with the KF2 blocks.