I thought of another tip - no not a sledge hammer... unless YOU have tension problems in your own belfry...
A long time ago my DH had a magnetic sign on his truck - well things happen and I ended up with the sign stashed somewhere although bits and pieces were cut off here and there. Glenn made a comment about a sheet of magnet on the bench so now most of it is on my bench - magnetic side up - it catches screws some times - well a lot of times. It is very easy to take something off the machine and line it up on the magnet sheet - I know it will pretty much stay put if it sticks to the magnet at all. if I could just find that little stray tension end screw I lost before I thought about that magnet sheet... no bigger than the head of a pin........ I went to a place that sells sign materials to buy the magnet sheet.