[RC-Monster Mike]

The cap is made from delrin. Rene's is an early prototype. I made one from aluminum as well, but the nice thing with the delrin is the fact that I can make the pocket ID slightly undersized - kind of a press fit. This allows friction to hold it on the motor vs. an adhesive. The aluminum cap looks sweet, but it can't be simply pressed on to stayin place. I used a rubber mallet to tap the delrin one onto the rear of the motor - not likely to go anywhere and is a nice tight seal. The motor wire holes are NOT large enough to push a 5.5mm plug through, but a 4mm or 3.5mm plug will fit through. If using 5.5mm plugs, they have to be soldered onto the wires after installing the cap.