Wow...... that's definitely a magnum opus - a great work. Simple hardware, awe-inspiring effects. LOTS of programming must be have done to the chip......
Several suggestions?
Orange or yellow segment display modules might be used for the ammeters and altitude displays if you'd like to, for they resemble the color of segment displays on the real aircraft in a better way. Colored films can also be used to fine-tune the display color and the color of reflected light of it.
For the landing light switches...umm...How to replicate the "cat-eyed" T-shaped handles on it? Fluorescent stickers plus 3D-printed handles (galvanize a layer of metal? Maybe it's too hard to galvanize plastic things at home.) might work well. This is just a minor change, no need to care about it.
But what happened to the air conditioner? All the three thermostats are labeled as "after cabin temperature", so how to manipulate the temperature of flightdeck and front cabin? Maybe the silk-print factory is responsible to it. The believed-to-be front cabin thermostat knob is colored orange, but that's just a minor problem, leave it alone.
Anyway, nobody could deny that you've made a wonderful job and the panel you've created is better than most of the ones that we could access or afford. Hope you can share more projects with us and we're sincerely welcoming everyone who loves aviation to join this big family.
(p.s. while dealing with the pedestal board, I suppose that the fire-protection switches and the cluster of different levers might be the most difficult part.)