I've got a Beseler 8922 motor base and drums that have been sitting around, unsued for a few months. The issue is that the tabs protruding from the base prevent the drum from contacting the moving wheels. Is there something obvious that I'm overlooking here? Is there an adjustment inside for the wheel height or did this particular example get it's wheels pushed in? I could cut the tabs off and be done with it but I assume they're present for a reason. attached photo isn't my exact specimen.