Hi Bruce: The prop shaft bolts to the end of the motor can, a machined boss with three tapped holes. I had heard the E25 is a clone of the AXi 2826 and this seems to confirm it. I would check the Hobby Lobby (RC, not crafts site) for AXi parts pictures. The item is pricey, like $25, so somebody else probably makes a less expensive version. I have not checked EFlite's site but that would be a likely source.