Begreen, Your 20” dia x 24” long log would way less than 300 lbs if it were waterlogged. Should be no problem for a 500 lbs capacity lift. Cmonstart, Larryd, What leverage ratio does this TW unit have? Distance from the center of the log to the pivot verses the end of the handle to the pivot? I don’t think I would put a 40” log on a splitter personally. I’d use the Stihl splitter first.