What rack case are you using for Wing Rack?
I have an 8u rack that's about 17" deep (20 with covers on). It holds my Soundcraft UI24r, a sliding shelf with a wifi router and a small UPS mounted to the bottom of the rack in the back. IEM receivers are mounted on band members' pedal boards, not in the rack.
The UI has all inputs and outputs on the front, and we connect directly to it each show. I'll be replacing it with the Wing, so all connections will now be inside the rack, so I'll be reaching halfway in every time I'm making connections. It's probably fine for the 15 or so shows a year we do, but I'm curious if anyone is using racks that are more shallow for this reason.