Yes, the large white panel ^^^ is a seperate panel, held on w/ thru bolts like Dozer did his gunwale panels. 4, 5 bolts would probably do it, but more would help the panel hold it's shape better. Actual upholstered piece could probably be made w/ 3/8" plywood. The piping stapled to the back of it, just showing around the edge of the panel, rather then covering the staples from the top vinyl being pulled over the edge would look better if the panel stays flat, and hides those staples.
To hide the staples better the piping should probably be stapled onto the console, like I suggested earlier.
The blue/light gray lines around the console gauge face, thin stock aluminum, w/ screws every so often. It should be soft enough to match the curve from vertical down under the dash, along the bottom of the dash, and across the top.
I've been taking the Jas graphic rendering online class nites ^^^^