use a mth z4000 and mth tiu. there are 4 atlas switch tracks to cross over between my inner circle and outer circle. there is a electric leak because turning one handle on gives slight power to the other circle without using the other handle. I have fibre pins only in the middle rails of all four atlas switches. originally had an atlas o gauge switch track intended for switching between inner & outer circles but it last 5 months with the premier mth steam engines before one of the soldered rails broke completely off. Quality & design seemed poor, but when it broke, left it on a shelf for 7 years. the 4 atlas switches are the only place the inner and outer circles intersect. I checked the wiring on both the mth z4000 and the tiu, just in case small strands shorted between the terminals. Is is possible my z4000 or tiu has leaks internally? any suggestions for isolating this problem?
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