Humor sometimes misses the mark.  I had a friend that had panel mounted compass problems - caused by a bundle of electric/signal wires that passed near it, not steel nut thingies used to secure instrumentation.  You should have seen the compass move when certain devices were turned on or off.

 

Good Luck,

 

Grayhawk

 

I get your sarcasm.  I guess I will use the standard nutplates.