[Qman]

I can highly recommend the z-machine kits from Slot Car Union in France, 2 wire connection and the tiniest LEDs you'll ever see, post to the UK is fine, and (touch wood) I haven't been stung for customs/VAT
https://www.slotcar-union.com/en/recherc...mit_search=

Some of their sets even have working brake lights & exhaust flashes