anti kit
my riding partner and I both have been running anit ratchet drivers from WAHL brothers on our kits. However to make them work we have to machine the outside of the hub flush back to the wheel, clearance on installing drive shaft bearing is tight but doablem, this is on TS clone kits we built several years back. ALSO, on most kits the anti ratchet driver teeth that go through the track windows will hit your rail tips when you go through bumps, so you will have to shorten the front of your rails and then run anti stab wheel kit on the front of your rails.
A better solution I have seen is running a single anti ratchet driver( the type without involute drive lugs......narrow type ) in the middle between the stock drivers, then ( depending on the track ) run that driver in the center window or cut round track ports down the middle of the track, works and I would say less drag.
Watch your anti ratchet drivers for dragging and rubbing on the track clips and grind the areas that rub and touch to minimize drag.