How did you guys mount the magnet?
Turns out the all-purpose adhesive I used worked like a charm. I've probably only put 600 miles on it but it's holding fast.I actually wrapped it in one layer of 3M double sided foam tape and wedged it into one of the "cush" holes where the disc surface mounts to the rotor. Then trimmed the tape away. Worked great, can't see the tape and it's been there forever now. Never moved a speck.