I didn't catch that in the Fender video Porter Cable what? Belt sander, Disc sander? One I have mine roughed in I use My Ryobi 18v sander
That's some beautiful mahogany and work, Scott!
Fender used a modified stroke sander. My Porter Cable is a 4"x36" with 80 grit belt sander, pulls 10.6 amps. We used to attach extension cords and race them at the speaker cabinet shop I worked at in the early 80s. This one was less than $100 on Ebay, new maybe $250. turned on its side and clamped to the workbench it works pretty well as an edge sander. I also have a Ryobi 3x24 but it doesn't have the grunt.
The draw knife has a very slight radius, works pretty well, I've used it on the previous JAEbirds using the same drawn radiuses on the back and side you did. With the belt sander I hold my elbows in and pivot my torso. Come on down, I'll give you a lesson.
This is the jig I came up with for locating bridges, those are 1/8" brass pins sharpened in 1/8" holes . Give them a tap and the holes are located enough for wood screws.