I have changed out magnets many times without a problem. I recently removed the cover of the bridge PU, carefully using a dremel wheel, and removed the magnet and replaced it with another magnet. Now I usually place a small piece of painters tape between the screws and lugs and apply 4-5 small dabs of silicone then replace the cover and re-solder the sides. When I did this it suddenly resulted in no volume. When I placed the selector switch in the middle position there was no bridge volume but I could hear a tonal change with bridge tone knob. Here is the thing, when I removed the cover it works fine but when I put the cover on the bridge PU there is no volume. I checked connections and sprayed contact cleaner with no improvement. Something with the cover is causing the problem. Any suggestions?