I also reduced the outer rollover hoop posts, to make them level. Their only purpose (being that high) is to provide a seat belt anchor, but I now have 4-point harness, so they have been removed. The back is now flat (it has always bugged me!).
Since I am going for a classic/vintage look, I removed a lot of plastic and made up some 'washboards'. The centre compartment opens (as before). I had a set of new rollover bars manufactured, as I needed the ends the same length (a perfect up-side-down 'U').