Wooden train rail connector

A simple two hole connector for the IKEA and Lidl wooden train rails. 
Other models was not fit - but I don't know what was the problem: My printer or my filament (Ender 2 pro and Polymaker Politerra Shapphire Blue PLA). So I made a totally new model from my measurement.
It's a little bit smaller than what will need, but my boy using it with satisfaction. It makes more freedom to design than a more precise model.