Black Cat Bicycles who not only make some absolutely stunning bikes, but also create some of their own frame components like dropouts. And I saw that they had modified a set or two of their dropouts to run with the belt system, and that I might be able to do the same. The swinger-style dropouts they have were very similar to my ideal setup as well, as they have a couple features that make them particularly well-suited to the demands of running a belt... pay me and I'll explain those secrets to you :)
I think it came out great! The tube is bonded at both the seatstay/toptube juncture and at the portion of seattube extending from the bottom bracket.