ORIGINAL: MasterAlex
For what it's worth, I checked out the 2.5" Dubro spinners while I was there and the APC prop didn't fit into that either. [&o]
I know. I said you could trim that spinner to fit without having to trim the locator pins...
You're right; its not a big deal on a trainer. But with the model restrained, blip the throttle (rapidly advance/retard) and watch those Master Airscrew prop tips flex back and forth like a willow in the wind...