Firm foam for Schumi

[spiro]

Help! After a short raceweekend with my B4, I experienced for myself the crap quality of the Schumacher firm foams. Been running yellow Mini Pins on a high traction carpet, and the foams are gone. Annoying. Swapped to some inlays that came with Losi BigShots, and they seem better. So far.

What do you guys use in your Schumi tires to make them last? (Front and back? Same question for B44 front tires as well.)