Bill, I have the same Standout Designs unit as the picture in the post. I am using Blue Jeans Cables to connect my 1070 to my 7500. I have the back extender (as in the picture) and just run the cables from the 1070 directly to the 7500. I don't go outside through the wire management holes for these connections.
I am having it built to be 24" wide instead of the 22". At the time I thought all I would need is the 24", and not the 26" an extender would give me.
It looks as if I may have not given myself any wiggle room.
I have some wood working tools that I can use if I need to add some more depth by making an extender
I believe it all should work except for the APC J15. The power cables that plug into it are just to stiff . I will probably have to cut out the back panel behind the J15 and add some depth.
The shelving will be one inch narrower than the inside dept to allow the cable to run top to bottom as you describe
There should be only 12 av cables that exit/enter the cabinet
8 speaker wires and 5 power cables
On the one side I will have
990
Carvin 2 channel amp
Oppo DVD P
Cambridge Audio CD P
On the other
APC J15
Parasound 5 channel amp
Direct TV box
I ordered all the parts / tools to make my own RCA interconnects yesterday.
Hopefully everything works as it is supposed too.This could turn out to be one of those coulda shouda woulda moments I have come all too familar with. The cabinet my not have any back panel after I get finished.