The cars I used in the photos are:

Custom '93 Nissan Hardbody D21 (Hot Wheels)
Custom Datsun 240Z (Hot Wheels)
Lamborghini Gallardo (Bburago)
'66 Pontiac GTO (Hot Wheels)
Subaru BRZ Pandem (Hot Wheels)

If you wish to have a display base tweaked to fit to a different car from a different brand, please send me these dimension for the display base holes: https://imgur.com/5T6mb2L

The display base is separated into many parts for easy printing, build and colour swap. The base parts are:

Floor & Base parts:
1) Base (Base - Giant.STL)
2) Flat Base (FlatBaseMain.STL & FlatBaseMain - No Holes.STL)
3) Walls (WallBrick.STL, WallMesh.STL & WallStandard.STL)

Main Building parts:
1) Building Walls (BuildingBack.STL, BuildingFront.STL, BuildingSide.STL, BuildingSlantSide.STL)
2) Building Decoration (FrontDeco2.STL, FrontDeco2 - Plain.STL, SlantSideV2Deco.STL & SlantSideDeco - Plain.STL)
3) Roof (Roof2.STL)
*4) Ceiling (Ceiling.STL)
5) Floor (Floor.STL)
6) Door (Door.STL)

*Only useful if LED is used

Optional parts for interior:
1) Inner Walls (InnerWall2.STL, InnerWall3.STL & InnerWall4.STL)
2) Rims Rack (RimRack.STL)
3) Nos Wall (NosWall - No Logo.STL)
4) Nos Wall Holder (NosHolder.STL)
5) Nos Logo (NosLogo.STL)

Print Settings
Nozzle size = 0.3 mm (Should be printable with 0.4)
Layer height = 0.2 mm

Filament change layer for colours on "FlatBaseMain.STL":
1) Start (Parking lines colour, mine is in yellow)
2) Layer 4 (Overall road colour, mine is in black)
3) Layer 9 (Sidewall colours, mine is in grey)

Filament change layer for colours on "Floor.STL":
1) Start (Gaps colours, mine is in black)
2) Layer 4 (Floor panels colour, mine is in white)

Filament change layer for colours on "NosWall - No Logo.STL":
1) Start (Wall colours, mine is in gold)
2) Layer 6 (Nos bottles colour, mine is in blue)

Filament change layer for colours on "SlantSideDecoV2.STL" & "SlantSideDeco - Plain.STL":
1) Start (Window side pillars, mine is in black)
2) Layer 6 (Overall wall piece colour, mine is in red)
3) Layer 11 (Turbo logo colour, mine is in silver)
4) Layer 16 (Turbo logo outlines, mine is in black)

Filament change layer for colours on "FrontDeco2.STL" & "FrontDeco2 - Plain.STL":
1) Start (Window side pillars, mine is in black)
2) Layer 6 (Overall wall piece colour, mine is in red)
3) Layer 11 ("Turbo Boosted" outline colour, mine is in black)
4) Layer 16 ("Turbo Boosted" lettering colour, mine is in yellow)

Assembly

Flat Base and Base
The car is tied by wires through the hole in the flat base and center flat base. Flat base should fit nicely into the base, the flat base should be glued or tape to the base. The flat base should align to the bottom left of the corner.

Building
Print the building walls first, highly recommended to use tape to hold the building together. Install the slant side wall last if you plan to use the inner walls, it easier to slide the ceiling and inner walls through the slant side wall area. The slant side of the wall has no groove to slide into the front and back wall, use tape or glue to hold on to the both walls.

The "glass" seen in my photos are made with PVC sheet, I double side tape mine on to the walls.

Ceiling (LED Variant Only)
The ceiling will fit on top of the inner walls.

Building Decoration
Both decoration piece will need to be glue or tape on to the outisde of the wall. The Roof is designed to fit nicely over the whole area of the building.

Door
If you have printed "InnerWall2.STL", the lower wall is meant for the door to sit on it. If no inner wall is printed, glue the door to the building front wall.

If you are unsure on how to assemble them, please send me a message or leave a comment.

Others
Feel free to send me any feedback on how to improve the design. Suggestion on display base designs are welcomed too.

I can be contacted through Instagram or Twitter too:

Twitter: https://twitter.com/Giga_Penguin
Instagram: https://www.instagram.com/GigaPenguin3DPrinting/
Facebook: https://www.facebook.com/groups/1115757609295068/