Learned: Building a bike always costs more than you think it will.
Learned: It's cheaper to buy the bike complete than to build it from parts.
Learned: You can't get your investment back if you sell the complete bike.
Learned: 52cm is too small a frame for me.
Learned: A lot about building bikes.
What I have is a lovely bike that happens to be at the small end of my fit range, and on which I spent nearly the price of a new one, and for which it seems I can get back perhaps 3/4 of my investment if I sell it as it is. The consolations are that some of the parts I used are better than what comes on a complete Cross Check from Surly, that I did learn a few things about building bikes, and that I do have some options for what to do with it. I can sell it complete and take the loss. I can put the parts on a bigger frame and sell off the smaller frame--thus not losing the value of the parts I bought. I can ride it as is. For the time being, I'm keeping it assembled--the easiest way to keep track of the parts.
What I'd really like is another touring frame like the one I had in the 1970s (pictured in the post "Bicycles in the Living Room"). I don't really need it--I have three other bikes I can ride. Still, I'd like something reasonably light that is suitable for long rides in a wide range of conditions. And such a frame costs more than many complete bikes, including Surlys.