My son can finally cross his racing track and he is so happy. This is my design, works fine for us. Compatible with Hot Wheels tracks. Nice, smooth and sturdy. Fits up to 4 pcs per printing plate 256x256x256.

This one also contains my latest revision of the connecting are.

Be careful when removing the supports from the inside! I did it by sliding a razor blade first, to detach them from the model.

I am constantly adding new parts to my boy's set and I'm more that happy to hare the models with you guys, so enjoy.

Other compatible parts are in my profile.

Hope that helps your kids too! :)