I'm new to the KF - but mine is planted.
Built as per kit - but with 1.6 drilled pistons rear (not drilled front) and 25wt oil rear - 35wt front. Also long link on rear - that's it
Also - it appears from other local drivers experience at our track, that the original chassis with Saddles works better (all astro track) - I tried the low grip and went straight back to the saddle chassis after one run!
A friend though also has a KF2 and cannot get it to work right at all - same shock setups feel totally different on the bench - it's like his car is 'jinxed' and he can't get it to work at all - maybe some of them are just 'flawed' !