I haven't checked in here for a while... just seeing/reading the dash and seat comments/photos for the first time. I have to agree with Skip and others... real burled wood would not have been to scale. Plus, as Skip noted, the finish on these dashes was glass-smooth lacquer... there was absolutely no woodgrain visible, so using real wood in this case would actually not have worked as well (and been a lot more labor-intensive) than using your photographic technique. I really don't see any way to make your dash look any better... it's right up there as far as quality goes with the rest of the model (engine and chassis). Also the leather upholstered seat looks great! Again, hard to criticize anything I see here.
I say take a deep breath and relax. You are doing spectacular work.