Wow, what a thorough writeup, it was fun to read through that! Thanks for putting as much effort into the writeup as you did the build!
One comment I could make is re: the Stan's injector. I've got one, always found it to be a pain in the ass. What I find to be far more effective is Stan's own little 2oz bottles. I've bought six or so of them, and each holds exactly one "standard sized" dose of sealant, so there's no need to measure it out. Take out the valve core (stan's tool for that is great) and then shoot the sealant in directly from the sharp tip of the little bottle. Then refill it from a big container of Stan's. Easy peasy, so much less work than the injector.
Really loved all of your really clever and innovative pieces that you made through the build, as well. Love the custom axle nut.
Finally, I didn't see any photos which really demonstrate the rear tire clearance with the 2.25" Ralphs. Could you post one? I've run 2.4" Ralphs in the past and love them but very few of my current frames clear them. Mounted on a set of ZTR Arch wheels, they're about 58mm in the casing and almost 61mm across the knobs. They "clear" on some of my frames, but any type of out-of-the-saddle shenanigans results in rubbing, which is not good.
Thanks again!