I recently upgraded my Peterson ATS to a WPF (All Terrain Saw to a Winch Production Frame) and i am real please with the change. I have more than doubled my production while working alone and it is easier to use also. Now don't get me wrong, I liked my ATS but the upgrade was worth the investment. It seems they are going to keep the days at 24 hrs so I had to do something to get my work done faster, especially since I am getting older and seem to tire out before daylight has gone more often than I did just a few years ago.
On a second note, i decided to sell the parts I retired in the upgrade. I will be sorting it out and getting pictures and listing it on the classified in this forum within a few days. My thought are that someone looking to build their own mill could get some good use out of my retired parts.