I saw Djkleric's make with a screen and wanted one myself.

His uses a 5" screen but i didn't like how it's slightly inset and couldn't sit flush, so i opted for this smaller Waveshare 4.3" panel. All data and power is through the single DSI cable, 

The screen fits pretty much perfectly snug. Just slot it in and use 4 M2x8 sized screws to hold the display through the rear feet that it'll sit on. 

Recommend using supports because of the mounting points being overhangs. For a perfect clean print, use PETG as an interface layer with 0 gap.