Well, thanks to tips from Matt and a little more patience and understanding, I was able to finish cutting out all the new pieces. The uprights from Frame 001 were reused, as were the 3/4" side uprights and the shoulder wings.
I cut the new Upper Ring, the Base Plate and the Center Ring, along with all new Horizontal Ribs.
The result, a straight, square, non-leaning wooden frame! WOOOO-HOOOO!!!!!!!!!
Throughout the coming days, it'll be time to glue it up and clamp it down for drying. Gotta run to get some wood glue tonight.