I have had something like that on my list of things to do though.... for the heater, the pump, and the water heater. All through are screwed in place in a way a kid would have done it. In fact now it's worse since Camping world decided to add screws top and bottom to my pump door cover.
So you are relying solely on the magnets, with no mechanical attachment?
I never thought about using knobs. I bought thread inserts and knurled screws to replace mine with.... but now I need more since camping world's modification...
I'm a mechanical guy an I like a positive mechanical attachment for things.... I'm not a chemist so I don't like relying on adhesives solely, and I'm not a sorcerer and don't go for that magic magnetic stuff either.... but do you find they hold well enough?
I'm rethinking now, maybe use my thread insert idea along with small knobs. Might look better and be easier to remove without tools.... You gave me something else to study on....