Brio Connector

thingiverse

This is to repair the broken off male connectors on a Brio-compatible dual train signal. Print with supports in mind. Note that the insert which goes into the toy is designed for 12mm, but this might be too long for your specific needs. The fit can be quite tight - you may need to pound the parts into place using a rubber mallet without resorting to glue. The shafts may require some sanding to bring them to the correct size. Alternatively, you could adjust the overall dimension by 0.2mm and use adhesive for a secure connection. Once mounted, another piece of track can be used as a wrench to fine-tune the connector's alignment.