Update: Finding it hard to directly work with the scan as it's just too damn big, something like 4M+ triangles. It chokes the computers. So instead I'm sort of recreating it in a form I can work with. Note the notches and sort of strange contour on the bottom of the gauge opening is from me hacking at it to get the prototype to fit. You won't see that in the end obviously.
And for ***** and giggles, the scan plus the panels I'm simulating it with, PLUS the model of the original prototype