This looks like a very simple system to use. I note that in some of the You Tube videos, a small circular magnet is placed between two sleepers. This creates the problem of the operator having to hit the right spot to carry out the uncoupling. Is it not possible to put a bar magnet underneath the board running lengthways so that the operator does not have to be so precise in stopping the train at a particular point which if they miss it, leaves them having to move back and fore thus destroying the illusion?