I have that omnifi for years waiting for an install. I had two of them, but sold one a couple weeks ago.
Since we're talking stereo, here is what is going on.
Making the mounting rack out of starboard to fit the opening. I'll epoxy some boards to the wall and screw the mounting board to those boards.
The electrical wiring.
The component layout.
New plate to mount the head unit, switches, omnifi and equalizer. It's being lasercut out of aluminum by someone I know.