Yeah I think I must use only ChanceKJ measurements for my plan.
Because I started with his measurements. ^^
But it's interesting to know that there are differences.
I agree it makes more sense to have this small batons against the marquee.
Once you have the side plan finished and Chance prints them and they match, then you can tweak things I think

You drew a plan of your cab on sketchup ?
I started to but never finished it.. My cabinet is being reclaimed as a FIFJr / MAME cab. My intention was to document the cab before it was gutted and modified. Sorta for posterity.. Most of the things I removed are saved and I have the measurements to put them back in 20 years if I feel like it..
My measures are all in SAE not Metric, using Fractional Plywoods. So as I was going I was using the closest fractional match. This is one of the reasons the sides and outer dimensions are so critical, a "scratch build" next to an "original" should look identical at 10ft.. If they dont you cant have a badass row like this
stolen from google
I am genuinely excited to see how close you get the sides. I think its going to be the hardest part, I never even started the sides on my drawings.
I stopped drafting up the cab when I tried to find 9/16 ply and it wasnt to be found.. I assumed I would go back and convert all the imposable to find, fractional ply to lumber that is available here in the states, just havent got to it yet...