Awesome job. I would have done a full height brace instead of your tricky angled brace you did there. It worked out for you so all good. AWESOME build so far. I am not knocking your braces just that I dont have the skills to be as accurate.
You are getting pretty good at this Luke. How on earth did you keep PL from squeezing out of the outer angle piece over the mouth of the horn?
About an hour after applying PL premium it has already expanded about as far as it's going to. It's also still "soft" at that point, and it's then that I'll cut off or remove any excess glue I don't want.