DIY chain road system pt3 magnets

Some magnets arrived & so to find out what the deal is with the heights / height of the infill etc that needs building to get it to work , bit of the hand of god to pull the chain by hand , the axles on the HO scale cars magnetise to the magnets & do lift the front wheels up by a whisker , so a few mods to the undersides to get the magnet to sit higher up. But so far so good.