Any tips on setup or accessories that make this rig better?
When setting up the harness, instead of using the short cut of tubular webbing at the bottom plate slots, it works better to use a triglide on the backside of the plate.
The protectors at the top need favored upwards to protect the strap from the top of the plate more than the slots.
Are you using their STA? I was just looking at this set-up and when building it, the drop down menu says it is optional for the soft back plate but makes no mention of the AL or SS back plates.
No, the wing has little stabilizers attached that do a fine job without an sta and has the added benefit of lower center of gravity.