Ninco Slot track inner curve border

This is just the inner border for Ninco slot tracks. This works only with the inner curve (I think it has a 45º angle). See pictures for further reference.

The piece is flat on both sides for easy printing. You can print it at 10% infill and in your prefered material and 0.2 to 0.3 layer height. I chose ABS just for the colour and finish.