All right, thought I'd throw this out and see if I get any response. People not knowing or not willing to divulge trade secrets is fine; I'll just go destroy 12A bits with the milling machine until I figure out the answers for myself in that case. No biggie.

... really three questions, come to think of it. Oh well.

First off, how are people attaching the stationary gears to the modified center plates? The one pic I've seen, the one from Hitman's site, makes it look like the housing and gear are sorta press fit, with roll pins to align things. There's not room to drill and tap holes for bolts like the stock stationary gears (and, I'm pretty sure, the 20B intermediate stationary gear) are held in, is there? The metal's kind of thin-ish, IIRC.

Second, how do you get oil to the bearing on the new stationary gear, or do you just rely on it coming out of the e-shaft? Seems to me that you could drill through the side (ala the external oil line bypass setups that various racing people use)and very carefully run a new line horizontally or something... but it doesn't look like that's done on the one pic I have for reference.

Thirdly, how the heck do tension bolts work? Drill holes into the front iron, use the shorter tension bolts and screw them into... what? The holes in the center iron are too small to tap for the normal size tension bolts... maybe helicoil them or something?

Thanks for reading in any case. And yes, I realize I'm breaking tradition for this sort of thing by not asking how to do the eccentric shaft.

 

don't think many people on this board have dealt w/ many non-20b 3 rotors.
youd be best off trying to contact Hitman and ask him since he's done it.