XP10F + XP8R is the way to go for the Carbotechs, at least on the stock Sport setup. 8/8 gives too much ice mode, whereas 10/8 feels pretty good. They've very grabby so it'll take a little getting used to. FWIW I've switched from Carbotech to
CL RC6/RC5+. The Carbotechs worked fine on the track on my good weekends, I just switched as part of debugging my long-term rotor destruction problems. First time I'll finally get to track-test the CL setup will now be Jan 26/27, but so far in non-track testing they've been pretty awesome.