Well done!
You might want to consider using a small foam rubber washer on each of the ball end screws. This to seal out dirt and dust that can interfere with the push button release mechanism. I was using small O-rings for this, and that is workable, but the foam washers make it easier to install the covers and are less fiddly in that regard.
I ended up making the foam washers from some closed cell neoprene sheet, as I couldn't source the washers on-line.