Bill,
I just measured the distance to the bottom of the blue board with my new layout and it's exactly 24" inches off the ground which appears to be a perfect height if I'm sitting the milk crate that I had planned to stand on in my original plan.
Rotary,
At the moment, I'm only using four of the line cards, connected to the Asterisk box. It just happened to come with 10 400E cards. Maybe one day I'll have some old step-by-step gear to hook up to the other line cards. I'll need a bigger closet though.
