GPintheMitten - you can keep it from spinning by either pressing the side of the log up against another big log, or something like a fence post, or if the auger isn't perpendicular to the ground then if the round tries to spin it will only be able to swing into the ground. also from what I understand don't try to split the log right from the middle, go a third down the length... But this is all conjecture since I don't have one to test these theories out! The units attach straight off the pto and don't use aa post hole digger typically have an arm that comes out parallel to the screw, so when you start the log into the screw one end of the log then rests on said arm and that keeps it from spinning. Happy Gilmore, love to see those pics of what you got! Thanks, E.