I have bought a Niota , size M/L. I was wondering what pressure would you recommend for myself. On the forks? On the rear shock RP3 weight 173 pounds Type of riding:XC Level: Expert Terrain, steep , very steep long climbs with long rough downhills single track, also some fast flat smooth single track. Square edges and some rocks. would you recommend the 4 inch or 5 inch setting?