I need to replace the Rapco air pump on my 0-320. It has 3 studs with the nuts and washers "easily" accessible with the use of the Rapco special wrench. The fourth nut us accessible to remove, but looks like it will be hard to restart when putting it back on the stud. I can use the wrench on it but can't figure an easy way to hold the nut in place as I start to thread it back on. Ideas appreciated.