The coil in long tube gives you the same results as clamping the over load. Limits axle wrap but does not eliminate it. Caltrac rattle can be fixed with a bike tube or unloading them when not in use.
this bar setup would be better than just clamping the overload to the leafs. mainly because you can add or relieve tension and at 3000lbs per inch of spring compression, its going to work better.
the ONLY issue i see is salt. it will get in there and you will get rust. that sliding tube will stick or wear out quick and the spring will rust. if they have some kind of way to really seal out the dirt and salt, it would be nice setup.
these are still a good all around setup but will never be like cal-tracs. I would be very curious if they stop noticable wrap when loaded down, big power, heavy throttle. would be something i could see sled guys using if the spring is strong enough to stay out of coil bind under power and load. that little bit of give could help on tacky tracks.
