RE: Blade CP main shafts junk brand new?
Hmm... Good point. It could be the hole.
I don't have a new pin but I do have a new shaft in the bag. I put it over the end of the pin that was sticking out from the hub and it does look like the hole is larger by a fair amount. If they've changed anything recently I couldn't tell ya.
Like I said before I'm not too worried with mine. That play should nill with the motor turning against the drag of the blades so I wouldn't expect it to cause any problems in reasonable flight. If you push it in loops and rolls or BL powered you might see some effect, but I haven't yet with what I've done with it. I just got a R50 anyway so my attention has been quite diverted recently...
I'm no expert here anyway. Maybe someone who's done more looking into this issue could chime in here?