I am awaiting my third spinner. I started out with an aluminum one for the three blade warp prop, then went to a fiberglass one for the Sensenich two blade. It had problems running true due to the bulkhead design. This one fixes all that and in my opinion is a far better spinner than others I have seen. By fastening to a true plane of the prop hub, it will always be running true, and no problems with screws coming loose or such.
