There is a video out there some were I seen were McClure had said 45_65in mains and 125_150 in rebound, I have played with mine all year, the best place I found to start is to go right on fox website and look at were the recommend to start, about 45 in main and 150 in evol fr back country, I'll be dropping mine back to about 35 in fronts and 40 in rear for mains. It really makes the sled easy to side hill get up in the snow great and it is a very smooth transition from side hill to side hill, very effortless... you can still launch of cornices and ride hard in those pressures, you will notice some bottoming on very hard big mole holes on trails...
Hope that helps thanks