Battlehardening Bosch 750's.

Take it appart.
Weld the forward plate to the housing.

Glue the magnets in with a serious glue like araldite. Fill in the gaps left by the springs with a not magnetic material. Make sure these are well secured. Do the same to avoid the magnets moving forward/backward in the housing if/when the glue cracks.

Remove the fan from the rotor.
Replace the 3 Torx bolts holding the back plate with allen key or hex head bolts.

On axe or lifter. Go Lifter.