hot wheels loop base with locking tabs

I printed the original file in Black PETG, but the kids broke it pretty quickly.

So I modified the file and printed this version in TPU (Both will likely print fine in either material or PLA, I can't speak for other materials as I have not printed with anything else yet) I added a few features to the OG file I downloaded from thiniverse somewhere, I can't find the file at the moment. to the original file I added.....
1) this one file will work for both sides, original had separate "right" and "Left" versions
2) locking features for the tracks because they kept popping off the original
3) puzzle piece numbs and sockets to lock both halves together (sorry they aren't done well, I was in a rush)
4) also added screw holes on the rear tabs and sides next to puzzle piece numbs in case the nubs don't fit together well after printing. I had dreams of mounting the bases vertically, but the kids are too small for ladders yet! hahah (if nubs dont fit in sockets, just cut off numbs sti