I think this is ready for publication for the masses! I did notice one broken image link, but I don't know if it's just my lame home computer or not. In my recent 3R postings, I have seen less resistance to Kadee couplers than in the past. I think you certainly have a winner here.
Finally, thanks for the image and contact info for Micro-Mark shims. I've been cutting mine out of sheet styrene ... That will make life much better.