That looks a lot like my build except I put my drawers opening along the 22" depth vs the short front of the cabinet. (I posted pics & measurements in a couple of threads about 18 months ago).
It is going to be a bear to lift up & flat. I added an electric winch to be able to pull it flat. When it’s tilted the X rails will slide down and then it’s very heavy to tilt it back flat so the winch takes care of that.