Great progress. some insight (that probably won't matter since you've already bought some stuff...

1) Nothing wrong with a premade box. I'm kinda surprised you didn't go with the premade box with the bedliner coating on it. did you not find one of those that would fit in the space you had to work with? I would have recommended this one if you're going for sealed to save space, but it has the bedliner coating... I have one of these for a 10" sub I added and the bedliner coating they did is TOUGH and I was impressed:
https://www.walmart.com/ip/Q-Power-Q...&wl13=&veh=sem

2) For the LED's to light up the cabin speakers, I would have probably went with a round LED Angel eye sized to match the bottom of that tweeter. But yours will probably look the same.

3) Glad to see I'm not the only person that doesn't sweat it mixing exile and WS! LOL. I have the exile BT controller and REV410s. Brian just rolls his eyes at me.

4) Love that max and your enthusiasm for modding it.

5) if you go LED cupholders, I strongly recommend the ones that have the translucent barrels and the whole inside of the cupholder glows. They're premade and actually surprisingly affordable and definitely some of the most professional looking ones around.