Small changes I'd make since its 95% perfect-
The cables should routed different, as shown in this pic
Also, and this may be pure preference, but you're going to get much better performance from that rear tire mounted the opposite direction.
Thanks Mike, but I have the Yeti schematic for the Ultimate, and I followed it when I ran the cables. Which one(s) in particular did you notice were incorrect? (I'm striving for perfection here!) I know the order of the top tube cables is correct, and I don't recall the schematic showing the front derailleur cable running between the seat stays like the FRO.
As for the rear tire, I have IRC Mythos XC rear tires that have a similar center "paddle" tread pattern that face the same direction as I have the rear Psycho facing, so I figured it was correct. I'll try reversing it as you suggest. Thanks!