I don't think you actually need the back cover; it's just cosmetic so if it doesn't print well, don't worry about it. My only problem printing the Ciclop turntable parts was the hand-drawn support that was added to the STLs; it doesn't really work, at least on my printer. It was acceptable for the turntable clips, but for the large arches and the center area of the turntable base it barely helped. I only got partway through printing the camera tower before my printer broke; in the time that it took me to repair the printer I also redrew that part in OpenSCAD to suit the Ciclop/ATLAS hybrid I'm building, which required a different size bay for the electronics and a different mounting position for the lasers (inline, rather than angled). Mine prints without supports, so I didn't have to worry about that. I didn't take a lot of pictures of the printed parts, but there are a couple of views here: http://bill-owens.blogspot.com/2015/...ble-build.html