Pulling up slowley, connecting with a little click and then taking off with the car in tow....What fun!....even though until I figure out a decoupling system I have to manually decouple them...

The actual magnets are 1/4 sections of a 3mm round magnet
I was surprised by how easy it was to snip these sections....
I let the magnets attach themselves to either side of a piece of card paper
Cut off the hook ends of the couplers and making sure they're properly aligned glue them onto the magnets
I'm going to experiment with grinding the magnets down. Both for looks and because the magnetic connection is way too strong for a practical decoupling system...