Has it be done before?

So a few months ago I snapped the pinion shaft on a VXL 3500kv motor. I ordered a new rotor and all is well. Bought a couple more used 3500's and I managed to depolarize one of the magnet's due to excessive heat...

Question: Can I change the good magnet from the broken pinion shaft rotor onto the good shaft with the bad mag? I assume they are glued and or pressed on? Has anyone successfully done this kind of repair? If so, how did you go about doing it without causing damage to the magnet?

Thanks!