Hi,
I've been running blues all round on a Losi xxx-sct on carpet... but had to dremel 2 outside rows each side off front and 1 row outside each side on rear as grip was far too much to attack corners without rolling.
have done 5 meetings with plenty of track time/practice, fronts still look untouched and probably one more meeting left on rears, will be trying yellows on rear next as hopefully softer compound will help to still grip as they get worn.
kourse kings are a bit slidey on carpet due to hard compound but as said above i would check servo saver too... i locked mine down as had similar issues out of the box.
hope this helps