Ivica, he said they're far enough apart, that coupling is not going to happen. Anything farther than 2", and the magnetic fields have fallen off to such a small level (it's a function of the SQUARE of the distance- twice as far, one fourth the magnetic strength- so a small increase in distance makes a big difference in less magnetic field strength) that they won't have a measurable effect, this is what he told me, thanks for the input ivica