I set out to make this remix because all the other track clamps I printed and used would break at the same spot along the layer lines on the sides of the square pieces that interface with the tracks (see picture below).

This led me to split the original model into just the clamp with large surfaces and then provide the squares as separate objects so they can printed on their face for optimal strength. They can then be super glued or 3d Glooped onto the clamp in whatever location and quantity you desire.
All parts should be printed as oriented in the files. One track interface square is provided but you can simply print as many copies as you need. No supports are needed anywhere.
I used super glue to apply the track interface squares to the side of my clamp and they've been going strong for months of abuse from my kids. The tracks will slide onto the squares from either direction also.
The author remixed this model.
My clamp has the print split into two parts; the clamp and the track interface squares which allows the squares to be printed flat on their largest face for optimal strength where they interface with the track.