I got my PiScreen yesterday.
I tried to assemble the case today and ran into a couple of issues.
1 - bottom piece tabs don't fit into the sides. I needed to use a file to enlarge the rectangular holes on the long sides so that the tabs would fit.
2 - The PCB on the TFT board is slightly wider than the PiScreen board. This makes it to that the end pieces won't go on.
I attached a photo showing the left side and the TFT circuit board is hard up against the side.
I attached another photo which shows the right side, and the hole for the tab needs to be moved about 1/2 the thickness of the plastic to the right.
Using my calipers., I measure the width of the TFT PCB to be 56.7mm and the distance between the tabs as 55.7mm or about 1 mm too narrow.
Even the PiScreen PCB is about 56.2mm and the Raspberry Pi board is 56.0mm