Fury,

Impact metal track spockets WILL work on HL! I have 3 sets of Impact tracks on HL tanks. The Tamiya shaft has two lobes on the shaft as opposed to HL's one....all one has to do is Dremmel out one lobe on the iside of the sprocket hub and they slide in and lock on very well. Didn't have any problems witn the idler at all, but possibly the KT has a different system? I don't have a KT so can't check it out.

May have to check with a dealer on possible sprocket shaft size changes.