Just got the 8.5A power brick. Everything boots and runs fine. I've got it scaled back to a 2.0 second delay in the staggered spin up sequence and no issues. I'm pretty happy. Wish I had thought about it the first time I was ordering.
Now I'm just waiting to hear back from the metal shop. :(
*Update: Got word from the metal shop. The case will be ~$135 to cut and bend to the specifications that I sent them. That includes materials. I've also followed up asking what would happen if I provided my own material.

