I could not find roller coaster tracks for printing that worked for me - so I designed them myself.

I slightly changed dimensions, so that it delivers functional prints with PLA (I used esun pla+). E.g. Pins dimensions is increased slightly compared to orginials to align with restrictions of FDM printers.

I also managed to get two rows of pins/bottom stuff on the tracks for increased stability. Originals only have one.

I strongly recommend printing only the Pin/bottom part first and check, if the dimensions work for you and you have grip with your original Lego parts.

If you need different pin size for your printer, you can buy me a coffee and I will change it for you, if you really need it and I can find the time...

I used 0.4 nozzle - result works well together with original tracks and blocks in all combinations

When printing: make sure your first layer is fine and use elephant football compensation. Otherwise the bottom will not fit on other Blocks.