Thanks, guys! I appreciate the support. Even stressing the little bits this is still a lot of fun.
Update: The frame is attached! This went much more smoothly than I had expected and I'm happy with the results. No, really! It's attached with carriage bolts, spacers and wingnuts. There's a little bit of a space between the motherboard and the upper spacer but I think it's just because it isn't fully tightened down and because the spine of the frame isn't straight. I might go in and try to straighten it some or I may just leave it be.
'tis a hefty beast already so when the time comes I'm going to make sure everything is properly tight and secure the pack straps with rivets and or zip-ties.
Years ago, a chubby version of me got to meet Ernie Hudson. I was super-hungover due to an ill-advised night out with a girl I used to go to school with. I stood in line for four hours in front of a guy carrying a door from the Dukes of Hazard car who talked about nothing but the Ghostbusters flight suits. For four hours. Anyway, I get up to Ernie and ask for a picture and an autograph.
I'm fanboying out so hard that I can barely say a word but somehow we end up in a conversation not about Ghostbusters but about how Dennis Franz had died and what a shame it was. Dennis Franz who was, and is still, alive. I spent my 10 minutes with Ernie Hudson talking about the death of an actor who wasn't dead.