ETO has Sprocket/track sets for the Sherman and KK has sprockets and tracks too. Mato has got HL pershing sprockets and for the most part i've been able to fit HL sprockets to Tamiya shafts, in most cases. have not done the HL-TAM pershing/sherman mix yet though. As for how the Tam sprockets work with HL pershing track, i don't think it will work for the samhe same reason you've already discovered, the pitch of the HL and Tamiya sprocket and track systems are diferent. Try looking at KK Separates...i don't think the IMPACT Tamiya sprockets come separate of the track...ask Bob Hearne at ETO though, he will know best.

sarvis