Well, as expected, it needs some tweaking. I used the half-finished part that goes into the frame (attached with zip ties), and bolted the plate bracket portion on to check the plate angle. Unfortunately, under high compression of the rear shocks it hits the tire, so more revisions are needed.
Right now the plate is 60* below the frame hoop, which is 25* upwards. That makes my plate ~35* down from being flat. I dont what to go much more than that, but I guess I'll have to.
From the little bit of the "Frame hoop section" I had to work with, it feels like it fits well. Hopefully the print I started today completed so I can do a full fitment test.