Hello and thank you for your advice.
I was hoping to hear something like that i.e. I could control the trains but the computer do the route work. Thank you also for pointing out the shortfall of this in that the computer will need to know where the train is. What would be good is if a system, such as the Z21 could provide control through the tracks and be 99.99% relaible, but I am just dreading the dead spots, hence looking at battery options
Ill head over to the iTrain forum (Edit - can't access that forum, Im not yet a Z21 owner)
Many thanks