3D Printed Magnetic Couplings

I don't see any flexibility at the point where the two magnetised faces meet, which effectively makes it the same as some of our early failed attempts at 3D printed couplings. These just reproduced the t-bar and hole on each end of an otherwise rigid connecting bar. I doubt the magnets would be strong enough to overcome any separation between the flat faces of the two halves which would result when negotiating ramps. Happy to be proved wrong!