Improved SMARS track with rubber band

This is an improved track for the SMARS. The track is shallower and binded with rubber band to increase friction to the running surface.
The pins are cut from binding rivets (size 1/8") which are very cheap and fit perfectly. The rubber band also makes the track contract firmly with the wheels.
The performance is must better and it can climb up a 30 degrees slope without problem.

Video link (without rubber band)
https://www.youtube.com/watch?v=_mcWqam1cnQ

Video link (with rubber band)
https://www.youtube.com/watch?v=B7zhVZoegUU