Certainly if you are handy and have the right tools it would be easy enough to build something like the Blackbird. It is not rocket science. It seems like the corners must be dadoed. (How do you spell that?) The thing feels so solid I'm sure you could drive a truck over it (without pedals on, of course.) Before spending the big bucks on this thing, I watched some YouTube DIY videos and was blown away by the construction skill and quality of some of them. I have zero free time and I could see it would take me a week or two to build one that I would be happy with, so I decided to buy instead of build.
For the power supply, if you aren't using any digital pedals and your pedals sound clean and are all working and your 1-Spot meets your current requirements, no need to change it. I have a couple of digital pedals that buzz or hiss with the 1-Spot but they sound dead quiet with the Voodoo Labs PedalPower 2 Plus. It has 8 outlets and I have 13 pedals, so I daisychain five of the low current pedals that are not sensitive to the quality of the power on one of the high current ports. The Darkglass pedals each need their own isolated supply to work properly. The Cali76 runs on 18V so it takes two ports.
Attached are some more photos of my populated BlackBird.
And the flight case is here: [Invalid or Expired Link Removed]
I'm wondering if anybody out in pedal-land is using this 3M stuff instead of Velcro:
https://www.amazon.com/dp/B004V3RALO/_encoding=UTF8?coliid=I3NP75M3BYS0OU&colid=1FCUXEND8SXWY&psc=0
I like that the pedals won't stick to the carpet if they are taken off the board, and I like that it's clear so you can see through it just in case there is something you want to see on the bottom of the pedal. It does come in black too.