Printed this Grind rail for my son, the picture shows the rail shifted over a little, printer is having issues, but other than that printed out nice. Didn't see any on here yet so figured I would share.

40% fill and layer height at .3mm or below. It is make really solid, so kids won't break it. Takes about 2.5 hrs to print, but really durable.

The top coping is the only piece that needs some detail. Think if I printed again I make customize the g-code for last 5 layers to be .2 to make the pipe look more curved.