12x are required per vehicle, 6x per sunroof.
A 0.2mm nozzle is required to print due to the tolerances required.
I printed this in PETG and have not had an issue with it, ABS/Nylon/PLA may also be acceptable. Due to the rails being aluminum and unobtainium, would not recommend using CF or other reinforced filaments.
The author marked this model as their own original creation.