I put comet shocks on my F3 this year and they are great so far, I rode about 1500 miles this season on them, the problem is comet doesn't make shocks any more so I got a good deal on them, $100.00 each, I talked to a rebuilder and he said the parts will interchange with Fox so there is no problem rebuilding them, look around and maybe you can find some for your sled, they ride great, they have the by-pass valving similar to the position sensitive Fox shocks so they are plushy over the small bumps and still have the valving for the harse bumps, I weigh 275 without gear on and ride all day without the shocks fading, the stock motion control shocks would fade after an hour of riding.