I wasn’t sure if it was the Aspen wood itself or my desire to cut stumps very flush for highest quality regen. The closer to the ground, the more grit is in the bark from rain splash, in sandy terrain esp., and I know cutting low will cost me in losing sharpness. But I cut the same style in other species mixes and only sharpen once a day. Could be that Aspen bark holds more grit maybe? There is one place I do like saw “noobs” - @ the saw shop. The guys are so happy to get a break from those customers, that anyone running ‘pro’ grade stuff gets quick enthusiastic service. Imo.