Last I checked Lars back plate were all at max top to bottom height leaving no gap or wiggle room for panels to fit together. Lars did a great job on his work but if you check his over all panel width it is at the max his side to side hole placement for Dzus connectors is off in the spacing form the side of the panel and from each other. This being the case there is more than likely going to be some thing off in the back lite panels that may cause a conflict. IE switches not fitting or possibly running it to supports from the side consoles. There are all so quite a few spelling / labeling errors I am sure you have all ready found those. The inconsistency of the back litght areas around knobs may all so cause you some problems . As far as the gap at the back you could cover it or make a piddle pack storage container for that area if your looking at making a replica cockpit.