Vekoma Classic Roller Coaster Car

Thanx to Tim (https://www.myminifactory.com/object/3d-print-classic-roller-coaster-train-142420) and Don1975 (https://www.thingiverse.com/thing:39229) for their good work.
I changed nearly every part a little bit, so I post this here as a remix. I made the back covers slightly smaller, so they will fit easily into the openings of the body.
The axes of the wheels are so fragile to print that they will easily break, I replaced them with glued 3x16 mm screws (slotted pan head, 20 pc). You find in the parts both versions, with or without axes. The connections of the couplings to the body are modified (consider front and back), and the couplings are attached to the major axes with two black 4x30 mm screws (hexagon socket).
I did not print the rails, you can use either acrylic 12x250 mm rods or painted wooden rods.