Well maybe I need to go try it and reshim again... I only did a quick demo of it to see if it'd work.
Why not use the
http://www.rc-monster.com/proddetail.php?prod=rcmcdmm Unless of course you want to fab your own. :) One of my three center diff designs uses Mike's universal mount; biggest downside I see is that it does raise the CoG. Btw what CAD are you using?
1350 on 6S, using bulletproof diffs and dirt bonz tires, would need min. of 44/12 to do ~45. In my Flux conversion I'm actually running the 47t spur gear without a problem. Switching to that allows you use slightly bigger pinion gears. With the 47, you'd use a 13 rather than a 12.
Center diff planning I'm thinking of going with a 50t spur to be able to use a larger gear to target around 45. Plus since I'm also thinking of running larger tires, like 6.8 rather than the 5.8 or so of most MT tires... it gives me room to gear down with the pinion. I was looking to use the 1600kV CastleNeu.