Thanks for the comments all. In answer to a couple of bits looking at both DCC and dc and not sure I’m confident enough to convert the dc locos. Maybe will do over timefor the isolation I was planning on using some wires passing through isolator switches at each end of the piece of track, rather than using sets of points (or ive misunderstood something somewhere)hadnt considered the fact a wheel could complete the circuit as it passes over; good point, need to think that one through a bit i may resort to the human error proof suggestion of lifting wagons between two sidings to simplify things as sure I will cock up any isolation activity at some point. Sounds like it is doable, but there are risks around inadvertent connections. Plenty to think about; thanks for the input, very helpful. Need to have a go at converting a dc loco i think and see how that goes!