I'm gonna haze ya a bit...cause it's fun! LOL!
So....I have to build yet another box for an already big enough box?
Also, you should see the underside of my pedalboard. One main power supply with another smaller power supply extension. A USB hub. A Source Audio hub. A 5-port patch bay along with a smaller 2-port through box. I've got a bit more room under there for some really small stuff...but probably not enough for an I/O box.
That said, if I really wanted to, I could use a power adapter that uses two 12v spots on a power supply to make one 24v connection...but that's two spots used up for one silly pedal. Nope!
Then again, I could just get another power supply extension. I'm using Voodoo power supplies and use one of their 4-port extensions...which could easily be used for this sort of thing. Super small and does a fine job.