I had occasion to open up my ECD-1 a few nights ago to dim the bright blue LEDs, and I thought I'd take some pictures.
I didn't have the proper hex wrenches for the digital section, so the aluminum cover remains in place for now. Should anyone be dying to see it, I'll happily pop it back open.
The external hex bolts were a bitch to get off, so I had to dremel two of them into flathead bolts. Having done that, the cover comes off easy now