Today, I riveted several of the stiffener angles to the right switch console, and clecoed the assembly in place to the right instrument subpanel and right vertical channel cover. As I suspected, the console is nice and sturdy; however, the lower edge of it moved laterally about 1/8" with about five pounds of hand pressure. Since I want this console to be very sturdy, I fabricated a cross brace between the lower inside stiffener and the sidewall of the cockpit. (Actually, I used the existing, "extra" stiffener that was designed for the stock switch panel.) The cross-brace is merely a 4" piece of 1/4" aluminum tube, flattened on both ends and drilled for attach screws/bolts. The console is now rock-solid. Sweet!
I also riveted the stiffener on the lower-right map pocket, and it's now ready to paint and install.