I was wondering what the winch was for and yes it would allow a smoother cut. Here are some pictures of my setup.
A big cedar down, bar on the Stihl just cleared the opposite side bark, there is a lot of taper in this tree.
I use a ladder to set a straight level surface for my first cut
Lots of wedges to keep it level, plumbers tape to keep it all in place - just remember to pull the nail loose before the blade gets there
Once the slab is cut I use my Husky 51 mounted on the Beam machine to edge or cut out beams. I'm making fence posts here and one run down, flip the saw around back the other way gets you a six inch wide post. I cut the slab six inches thick so I get a 6x6 post. Need it sturdy to handle the snow.