OK, removed the crank wheel on mine, made an adaptor in the lathe to fit the shaft (5/8 in. dia.) down to 1/2 in. for my DeWalt, got the line into a tree out back, and had a go at ascending earlier this afternoon. Works just as Santiago says, with the DeWalt on low speed. I got about 15 feet up when I realized the DeWalt was getting pretty hot. So switched to reverse and powered back down. But it works fine! Just need a heavier drill. I may go ahead and buy one since I can use one in the shop anyway. Hopefully DeWalt makes a heavier duty drill that uses these same 20v batteries. These batteries also fit the nifty cordless DeWalt chainsaw I got a few weeks ago. They just came out with these recently, by the way, and they are great. The motor is brushless, and of course the damn brushes and commutator are what usually gives trouble. I cut up small stuff all afternoon a few days ago without running the battery down. Stuff up to about 6 in. diameter mostly, and the saw walked right through it. - Stewart.