Hot Wheels Replacement Loop

UPDATE 12/15/18: Added top curved joiner for use of two 12" tracks rather than single 24" track per frestepi's input.

Replacement for the standard hot wheels loop base. This is nearly an exact replica of the stock base with minor modifications that made it easier to model/print.
I will update the model as necessary if issues are found. Please feel free to provide input in the comments.

I have upload this as a single piece and as two separate pieces to be glued after printing.

Also made a double wide version here:
https://www.thingiverse.com/thing:2567372