Standard 45mm G gauge straight track sections with connectors compatible with Bachmann plastic track. There is a 2 tie section and a 7 tie section (largest that would fit on my printer). I might add other sizes later as I find them necessary. There are supports at the end of the rails that need to be cut off after printing.

Creality

Ender 3

No

No

1mm

none

The 7 tie section is right length to add to a standard Bachmann straight section to match the length of the turnout I posted here:

https://www.thingiverse.com/thing:4686102

If this loads really big, scale down to 10% size.

Also see matching curved section https://www.thingiverse.com/thing:4686713
matching turnout https://www.thingiverse.com/thing:4686102
matching 90 degree crossing https://www.thingiverse.com/thing:5152508