One thing you need to make sure about using any harness on the Freedom Plate is that the webbing material can be inverted or both sides used.
Here’s why:
The Freedom Plate uses three slots at the top of the plate for the webbing to weave through. The two pieces come out from one slot/point in s V shape and run over your shoulders.
If you are using a webbing that has a printed side such as “H” for instance, one side will be right side out and the other side will be inside out just because of how the webbing sets up through the top slots. The webbing gets folded in half then weaves through the lower bar then both straps go over the center bar to “lock” the webbing in, then out through the top slot and over the shoulders.
So if you are wanting to use a comfort harness, make sure you can take one side apart to flip one side of the outcoming webbing 180 degrees and back into the assembly, or one side will be inside out.
The way the Freedom Plate slots work are the same as an old school backpack.