Originally posted by CN1
Does the electro-magnet work better, or is it tempermental too?
Much more reliable, they are more powerful and can be juiced up a notch if necessary. They are only on when you need them so accidental uncoupling is almost unknown. I will rummage thru my old MRs, there is a great article on home-made ones that came out in the mid 70s that look and work great and involve a minimum of track reconfiguring.