[BrianG]

The Neu cover won't work for the Medusa anyway for a couple of reasons:

1: Medusas are 35mm diameter and the Neus are ~40mm.

2: The Neu cover snaps on the rear of the Neu to keep dirt out. It wouldn't prevent the rear end cover from popping off.

3: Fairly recently, Neu started using screws to hold the end cover on their motors. And these screws are different for each motor. To use the cover, you'd have to dremel out the area where the screws would go for each particular motor - so Mike stopped carrying them.