My son wanted to build “the biggest train track ever” (of course). Unfortunately, the few kits of the newest Thomas & Friends Track Master that we have do not have nearly enough track pieces to achieve that dream. So I created some simple prints (supports only required under the male connector piece) that work really well. These pieces match nearly identical, so we haven't run into any issues with track alignment.

I printed all of the tracks in PLA Plus from various brands and so far they are holding up to all the abuse he puts them through.