Even when I an in the initial stages of design I am fooling with how assembly will go. I make options and sometime change how things go together, but allway have a plan before I even saw timber or cut joinery. Looks like you will assemble the bents with the tie beams and stand one up and brace it. Apply the girts and a brace, support that, and stand another bent against that, connecting the two together with the girt. Finish with the third bent same way. How long are the 2x6 and 2x9 tenons? Removing wood from tenons to ease assembly is helpful, this is could be a whole thread on its own.
