I created this as a folding toy so all the connectors don't get lost! It folds into quite a neat stack and is very easy to set up and put away.
The connectors will join to the track pieces with a piece of filament, but I used 85mm lengths of 1.5mm steel rod and the hinge plugs fit this perfectly https://www.amazon.co.uk/gp/product/B09YLX43G3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
The start piece and the end piece are slightly different as there is a different connector for each end (due to the way the track folds). To extend the length of the track, just print more inner pieces and the corresponding connectors.
All printed with PLA, aligned on the print bed on the flat surface. To print as seen, print 1 start, 3 inner, 1 end, 2 inner connectors and 2 outer connectors (they are a bit longer)
I printed mine on my Bambu X1C so I've also uploaded the bambu 3mf project file.
The author marked this model as their own original creation.