I made this, then found another similar Thing at:
I guess my version might print quicker. I designed this to hold the screen at a steeper angle, 60°, so it is a bit more horizontal than that other design.
Assembly is essentially the same as the other Thing.
Please disconnect from mains power before removing the base from the printer otherwise mains voltage live parts are accessible.
The brackets are a snug fit and require a little wiggle to locate, the fascia is simply a friction fit over the whole lot.
see also https://www.thingiverse.com/thing:2729170 in case you lost the 3.5" LCD screen cover.
a skirt or raft might help adhesion at the fiddly corners of the brackets.
A slightly slower than usual print speed might help keep those little pins accurate.
A higher infill might strengthen the area at the base of those pins, out of 4 prints I broke 2 pins off.