Amiga 1000 Mouse Encoder Fix

The small arm that holds one end of the vertical encoder wheel in my Amiga tank mouse was missing causing the encoder wheel to move out of place. This small block is inserted into the side of the encoder housing and prevents the axle from lifting up. I didn't get a photo of the broken encoder, but the second photo shows the arm this replaces. Please note there are several models of this mouse, so this may not fit yours. The block should have a nice snug fit so it stays in place. One side has a s