After selecting the trees to be cut usually 12 to15 large limby yellow birch ,I start my husky 162 and don`t stop till they are down maybe a couple tanks.Then Ithrow a tarp over the old saw,and start to work with my 36 inch bow saw starting with limbs thumb size cuting up to the size of my upper leg.I`ve used this method for a while and one developes technique.In a 3to4 hours I can easly de-limb a large tree and have my limbs all piled.No heavy saw to lift,no fuel,and best of all no noise.Now I`m not talking gramps saw from the shed'just a new sharp blade on a 36 inch bow saw wear it like a sash and you won`t even know your carrying it.After that 6or 8 cuts with the husky and ready to haul.