I went to Kyosho's Route 241 track last weekend, and their track is carpet.... there was a guy there running custom foam tires on his MR02 and his car was on rails.... the carpet on this track is the same as what's on the HTUSA tracks... I think it's Pytex carpet... I'm sure the dnano foams would have the same effect
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He who KNOWS he's stupid is actually kinda smart