Went thru the same kind of thing with a flm hybrid. One of the two was perfect, the other the hole for the pinion brg was 2mm bigger than the other - way sloppy fit. I got mine from RCM and email to Mike brought immed reaction from flm, who put new one in the mail (thanks Mike!) so didn't have to send mine in before they sent new one out.

Still its a disappointment to think, finally ready to build this thing only to get sidetracked with a prob! Life's full of disappointments.....Just got to move on.