Sorry to interrupt a great discussion.....
Brenner, back to the new Neu adaptor: do you have an estimate as to when it will be available?
I took apart my drive tonight and found that 4 of the 8 teeth are almost gone. (1 season of flying, and it should be noted that my motor is one of the ones with the swapped spacers resulting in less engagement distance)
From Neu's website, an estimated repair cost to the motor is $126 + 2x shipping. So, I'm not excited about putting a newly repaired motor on the existing adaptor.
The good news it that it seems like I'll be able to get additional life from the current pinion by carefully assembling it so that the unworn teeth now engage the drive.
Another reason I'm looking forward to the new adaptor, is that I've always suspected that the clatter in that interface contributes significantly to the overall noise.
( it sounds really bad at startup)