Disassembled, and re-assembled rollbar in the process of preparations for riveting the aft side splice plate, and minor alignment adjustments.
Left the top row of rivets out awaiting the angle bracket which attaches to the rollbar brace. Cut new angle bracket for support brace, but not installed.
Re-assembled to check overall fit again. With splice plate on the aft side riveted, it will be possible to clamp the rollbar firmly on the work table, and achieve a flatter "straighter" rollbar during final drilling and riveting. Need to avoid any twisting of the rollbar.