hi recently im make this 3 lane hot wheels regular track to Mag Track so you can combine between Hot Wheels and Mag Track together. but i readjust the width and leght so the track will fit 3 lanes wide, and the corrugated plastic need to be 5mm width, hard for me to find 4mm crrugated plastic in my country i dunno why,but you can simply readjust the "tongue"/connector to magtrack just add 1mm more. by the way i've been follow 3dbotmaker since finish gate and start gate on etsy. cheers!
i will update if i already print this connector and if 3dbotmaker willing to post my stl file at thingiverse it would be honor for me. sorry for my crappy english btw.