Great build so far ChanceKJ! I really love the Nintendo Cabs and yours is spot on.
Sorry if you already saw this as I posted it for user Wyo a few days back but I thought you might be interested in this for your Ultimate DK cab:
I found it impossible to find original metal or even reproduction Nintendo cab serial plates. So I did some digging and found this guy that shows you how to make your own:
I used his technique and here is how my Mini DK serial plate turned out:
I even have the artwork files if you want them. Just let me know and I'll send them your way. I made it fully editable in Photoshop with layers.