ORIGINAL: RocketRob
Guys, now I'm confused.
Look at my photo in post #106.
The prop on the bottom is the 4.1 and the front is face up and clearly visable is the insert ring as installed from the front.
I'll look at a few more when I get home.
IIRC, the glow props (which the 4.2-4 is) don't use shaft bushings, just the electric. Idon't see a ring inserted in the prop in the pic, but the resolution isn't good enough to say. I've bought only a few 4.2-4's since they were available and Idon't think Ihave ever known them or the other 1/2A props to use pressed in bushings like the electric props do.