Been noticing most everyone is using the APC props for 3D with the smaller glow powered planes. Purchased a couple for a Saito 82 that is installed in a 3D plane. What do you do to get it tightened down? The hubs or a little narrower than on wood props. Washer, spacer...What??
Using the washer and nuts that came w/ the engine. The threads on the crankshaft or not long enough so the nut can't go any tighter.

Thanks