@laurensvalk For anyone wondering what is going on here, have a close look at the carts and see the Spike Prime as the drive base - once the two motors are connected there is no third port for a colour sensor - so the stuck a LEGO Mario figure on the front and used its color sensor information from BLE.

Next, they manage to control Spike Prime with a Train Remote!

This is the power of open, hackable, and user supported products - @laurensvalk and his collaborators are absolute legends!