Avon ff tires this year on a lead pack Ivey motored Titan Mk6. After about 15 heat cycles the handling degraded mid corner to exit. Figured it was the car set up,redid corners and aligned. Still bad. New Avons - good again. My experience previously with Dunlops was 30 or more cycles of more or less equal performance. Anyone found the Avons are all through more quickly than the Dunlops?