I had a track trouble on my KT(cluch steer) heres how I fixed it I just replaced the springs in the "drum" with larger and stronger springs I have had no trouble sence But I did go thrue sevrel sets to fing the one's that worked good..Plus man I run my tank(s) on very rough ground as in my post above.Now after saying that.I belive the idler kits are not needed for the KT BUT mine is an older(1981) cluch steered,1 motored(540 size 55t lathe) tank. Would that make a diffrince??