Rare earth magnets will work but I have a couple of concerns. Long time exposure can and will magnetize what they are holding and why I do not use magnets to hold my tools. This could create problems in functioning later.
Second, while a rare earth magnet the size of a quarter and about .25 inches thick will withstand a mighty pull away, it has almost zero lateral force. thus the item can slide off very easily. Not a good idea in a dynamic situation.
Kieth, I counsel against.
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Hold Hard guys
Rick B.
Knowledge is knowing a tomato is a fruit.
Wisdom is knowing it is great on a hamburger but not so great sticking one up your ass.
Author - Richard.
Experience is what you get right after you need it.
Author unknown.