Connectors - Brio/IKEA Wooden Train Track by Timqui - Thingiverse
Fleeting- External reference: https://www.thingiverse.com/thing:4672882
they work well but are a bit to high.
I scaled Z to 88% to have 1.1cm height instead of 1.25cm. the original wood pieces connection I have are 1.1cm high