So I got a chance to mount and use this jack today. Only one log but it seemed to work real well!! Easy to crank up with weight on it and I was even able to turn the log with it still up on the jack instead of having to lower it, roll log, and re-raise the jack. the top is slippery enough to roll that log just like it was on one of the bunks. If it holds up, I think it will work out fine on my little manual mill.