I bought a 10mm x 20mm bar magnet that holds the bottom attachment to the arm allowing for movement but not falling out of the holder while I am threading the blade through my project and reattaching the top holder before tightening the tension to begin the cut. A set of 5 or 10 magnets is about $6 US . I have a WEN3920 Just finished a Steve Good flying eagle with 82 inside cuts. YOU CAN DO THIS!