Just wanted to put this out - just bought a used Craftsman lawn sweeper to help with fall cleanup and larger leaf jobs. Seems to have a problem at times with the wheels getting stuck and not turning. If I don't watch it, it will dig up grass and soil. Is it a height adjustment or maybe larger sticks getting lodged in it? I can't quite figure out what is causing the problem... Anyone had experience? It's a good unit in excellent condition. Just this wheel problem.