Most importantly whichever you have vent the crap outta the clutch side. I added R&M vents as well as the massive Timbersled clutch vents and since then I have yet to blow a belt at over 500 miles on a really really worn out belt. I'm basically maximizing the belt life beyond use despite riding continuous hard pulls and deep snow. I am running the 4 post with the 046 belt. Stick with what works for you, but having the cheap belts working for me keeps a smile on my face. I'm on belt 3 at 1300 miles, due for a new belt. The first two belts were my fault, the first belt lasting 500 miles without venting. The first two belts went from continuous hard pulls up deep powder climbs about 15 times in a row without venting or letting the clutches cool down. I've done that on this belt and all is well, the belt is just getting really worn now, they used to overheat and blow the outer band off.