Turns out, even with "Fatties Fit Fine" clearance, it's just a bit tight back there for a 29+ tire. My Knard would spin, but it was very close. Since the Dirt Wizard is measured to run a bit smaller bead to bead, I traded my Titec H bar for a new DW, only to find that while the casing may be smaller, the big cornering knobs rub on the chainstays.
This setback really took the wind out of my sails. I had grand visions that I could possibly dimple the chainstays a bit more to get the clearance I needed, but I don't think there's enough material back there to make this feasible (I also had an idea to cut off the stupid looking set tube brace, but I doubt I'll get brave enough). I started pushing the Monkey on my buddy Sean, who is my height and has not a single steel/rigid/single speed/29er in his garage. While Sean was hemming and hawing, I got bored and went ahead and finished the build last weekend:
