I've worked with the M1020's.

My recommendations is to glue the magnets with a decent glue, or support them with mechanical stops.

The front and back plates are el cheapo cast aluminium, and can break. Only supporting the front is asking for broken motors.

Some variants come with mounting points on the body.
The ones I have seen had the thin sheet metal brackets spotwelded to the body. Not very reassuring for RW applications.

And shockmounting is not a luxury anymore.