I toasted both of my ZTC decorders, aparntly the grayham farish motors had lost some of the magnatism, and thus what drawing more current, and that when the decoders where a bit under rated, especially when working in thre wire mode.
- so i got them remagnetised, and the chassis isolated, so i could use a 4wire decoder, anf fitted the (half price) replaments, which also had a higher current rating
daniel