About this 3D model

My son got a roller coaster K'Nex kit for Xmas and of course by the time he put it together he had lost several links of the chain that made it work. Rather than order some more I went looking for a part to print... and while I found a lot of K'nex pieces I did not find the chain link. So, of course got out the calipers and got busy in fusion 360 and after about the 4th iteration I got a link that works. Not sure how well a complete chain of these would work as they have significantly more friction than the real ones. But 8 of them in a chain over 100 is working fine. Version 5 update: Version 4 links to the original pieces a bit better but is bad at linking together, Version 5 is pretty good at linking to each other AND the originals... seems a touch weaker though. Working much better on the toy... also interspersed them at 1 original, 1 replacement.