that's a nice start, cool harnesses.
Which holes are you using at the back? How do you know they will hold? Is the angle ok?
What about the lap straps, are they mounted to the seat subframe? Closeup photos of the mounting eyes would be awesome!
I have a set of harnesses arriving shortly, but can't decide where best to mount them.
Here's mine Sabelt 3"
I had no interest in being able to move the seat once it was in place and I wanted to sit low down. My subframes are two pieces of alloy box section.