I have experimented with both Pits,(with just foam insert) and HPI X pattern radials, (with standard foam insert) and they both worked fine at Windsor. I have also used the M chassis slicks unbelted, (fitted with Tamiya firm moulded insert) this pushed through the corners however I was running HPI X-pattern rears. I am going to try M chassis slicks rear and see if push is reduced.

I have just finished making up a set of the RP30 tyres with hard moulded HPI insert front and soft moulded HPI insert rear, which I will be testing before Sunday.

I have tried a set of 60D's however car tends to lose speed on the tighter sections of the track, especially if you are running the silver can with the plastic fan. This is faster than the Tamiya sport tuned motor.

Hope this helps.

Calvin.