(Debuted at #mrrf2018)
This 180 degree turn with a 45 degree bank and 40mm drop hot wheel track has the ability to be mounted via a m5 x 6.7mm heat set brass insert from McMaster.
Step and fusion 360 files are included if you want to modify the design. Very likely you will need to do some clean up in the mounting slots. I am working on a tongue version of this same part, please subscribe to my profile if you would like to know when I release that part.