First off it was not rotton pine. It was very solid doug fir. The two are night and day. Dead doug fir limbs are hard - very hard.
As far as hardwood, a green black oak, white oak or madrone would have been just as easy if not easier to saw through. Dry would have been a different story. The Realtest is was what I did and do everyday. I cut them, limb them and buck them.
That is the way the saws get run. There is not use for me to make a "cookie cutter" out of it - it's pointless. Serves no purpose for my needs.
As far as mix, it was Husky around 47:1.
Just for the record, Dean, of whom I am great friends with milled my cylinder and piston - he did not build this saw - I build my own after learning most of what I know from him.
Pour it to um' Slinger. That is one hellauva finely tuned saw. Keep up the good work!