Inner skin was still a bit gummy, but this meant it knife trimmed well. [Timewarp 18APR20: I have since discovered the EZpoxy knife trims much better than the MGS, even after cure. Maybe that is why I haven't had much luck with knife trimming in the past?]
Trial assemble and nothing lines up. WTF? Then notice I haven't notched the foam to make it bend, so cut the grooves with the circular saw again.
Despite being a bit gummy installed the lower skin with EZpoxy flox, then floxed on R57 & R/B33 and weighted for cure. I trial fitted all the other bulkheads first, but will install them tommorow to keep it simple.