Lex-Lox for Policar

For the full history of this concept, please see the original for Scalextric Sport track.

https://www.printables.com/model/73611-lex-lox-by-traxpert-for-scalextric-sport-track

This was designed from scratch to fit the circular mounting spots in the bottom of Policar track.

Same as with the Scalextric one, print one to test the fit before printing a lot of them. Adjust the scale or flow as needed to ensure a snug fit without stressing the plastic. 

The spike has an internal pocket for a 6x3mm round neodymium magnet. Pause the print at the right height to install the magnet and continue printing over the top of it. Use another magnet or piece of steel on the top of the track to hold the spike in place while marking the board for where the button will be placed.