So Transition just released a super fun looking 29er. Long, low and slack like the rest of their bikes but the chainstay is 420mm!! The WW 062 that I have is one of the shorter ones at 430mm and it's a blast to ride. I would love to get the Vanquish but it's not in the budget at this time. I would love to see Peter or another vendor get close to it. Which I guess the CS-496 is pretty close but but it's also shorter in the top tube and reach but quite a bit.

http://transitionbikes.com/Bikes_Vanquish.cfm?Token={ts_2017-04-26_07:21:59}-cc777f12dbbf2ad6-A61BA4E2-DE92-BEEF-1B6F9ACC5B30E78A

I have 3 generic frames at the house. All came UD or 3k matte finish and I added some vinyl decals to them. Pretty easy to pull the decals off if I want to change up the color.

Peter did paint some rims for my wife's bike though. They look fantastic, color matched perfectly, and have been holding up great too. I would definitely let him paint my stuff in the future. For the cost, it just isn't worth the hassle.

What do you have for a fork on it? If it's easily changed to 140, I say go for it. If it involves buying a whole new fork, then that's a tough call. My wife's TB3 is 130f / 110r and it feels great. I wouldn't worry too much about having more travel in the front vs the back. It would suck though to buy a fork just to have it not work like you hope.

Speaking of this frame, how does one adapt a typical bottom bracket to BB92? For example, say I go for a Shimano 1x11 groupset - the XT MT800 bb states that is it compatible with 68mm and 73mm shell - what would you need to do to get it to work with BB92?

It's super simple, just get one of these.
http://www.jensonusa.com/Shimano-SM-BB92-41B-Bottom-Bracket

Not sure. I've been wondering the same thing. My 062 frame is setup as a SS and I would like to get rid of the tensioner. I have the BSA option in both frames and they've been issue free.

And all sizes frames in UD matt first batch production can be availble in 20 days, we still have some frames left and they can be preordered now

I don't need one, unfortunately. But I do know some that are in the market. I wish I could get one of them to buy one so I can try it for myself.

And for those that are curious to what bike it is similar too, I think I found one that is VERY close, the Santa Cruz Hightower. There may be others though. The difference is that this has 122mm of travel vs 135mm, and the bottom bracket is 6mm lower on the CS-FS27.

My vote would be to get the NECO and then a CC lower race. The two generic frames i have, both came with the NECO headsets and they have been fine. But the lower race does not have any seals to it. It's just an aluminum lower race. I think the CC races that have some seals built into them would be a good addition if you thought it would help. And they are only $10 from any LBS.

I get that you want a 24" specific frame and I respect that. But before you completely right off the 26" frame, take a look at all the numbers.

This is what I found when I built the 26" bike.
20" bike had 70mm stem and 20mm setback post.
26" bike has 40mm stem and a straight post.
Measuring from the handlebar centerline to the center of the saddle, the distance between the two is about even. So it really isn't a major jump when it comes to fit. The only kicker is the overall height when they are sitting in the saddle. Which would be helped by running 24" wheels. My daughter is fine with standing to start and stop so it's a non issue.