Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:6035892.
Wall mount pieces for Lego set 75355 UCS X-Wing
3-piece set to mount Lego set to the wall. Wall mount is angled in a way to show X-wing in flight, with enough clearance to allow all S-Foils to be locked in attack position.
3 pieces separated to allow for easier printing, and because I messed up the initial clearances and a third part was the quickest way to fix it.Print BackPiece on its side with screw holes parallel to print bed. (Supports may be required for screw holes depending on printer settings.) Print WallMount on its flat side . Print WallPiece with largest hole flat on the print bed.
Secure WallPiece part to the wall via suitable fixing. Larger hole should face outwards to allow for head of screw/both to be hidden in rounded area. Slot BackPiece into WallMount piece and align with WallPiece, 2 holes can be used to secure both pieces together with a suitable small nut and both.
Lego set sits securely atop the WallMount piece, the larger upright fits into the existing mount hole on the bottom fuselage of the set. Two additional smaller uprights fit snugly at the front and rear of the lower fuselage.
I printed parts in PETG with at 0.4mm with a 0.6 nozzle and have had no issues at all. 3 or 4 perimeters/shells recommended.
This is the first iteration of the wall mount for this set I've designed, so its a bit rough around the edges, I may update it if I can simplify or upgrade it in the future.