Got the rear base attached as well as the other side wall base. I must be a little out of shape because those (2) 1/2” x 10” lag screws about kicked my ass ?.
Decided on a different action plan for these two walls. I’m going with solid wood walls, each row will have liquid nails between them and those damn lag screws every 3rd row from every corner post. So the walls will be 6” thick and fiberglassed on the inside. I’ll put 3/4” plywood on the inside for the windows as well as 6 braces over the top, securing the top from bowing. Those will be 2x8 notch cut on each end for a precise fit.
Price wise this avenue will be approximately $300 cheaper than my previous route.