Looking good so far, John! That's an amazing piece of wood you chose, and the continous back will be amazing. I hope I was of some help with the knobs; one thing you need to decide on, though...as you can see above, I chose the 'skirted' design. Roger offers different shapes and heights of knobs, so think a bit & decide what is best for you & your playing style. The skirted type are slightly fatter & taller than the standard-issue black knob, but easier to grip (IMO).
I know, it's not easy designing your dream! Best of luck....
Chris