I think you're right in the fact that it sits to high, I think it should sit about a cm lower to be in line with the roof here is a another picture. It doesn't really bother me yet
but I Think an oem base plate will happen in the future.
on another note, the roll bar is now fitted completely. was a real hassle doing this on my own and trying to keep the side panels in. so some scratching of the bar has happened unfortunately.
I think the X bar will be sold on. as this is a bit much now. to much junk in the trunk