Thanks Nigel.
I have been thinking of what the requirements are. After looking at the timetable that I have created for Grimley, it is possible to have three trains moving at once not including locos shunting in the depot. Being realistic, the maximum number of trains moving at once (not including the depot) is going to be four e.g. A Multiple Unit arriving on the Down Slow, HST passing through on the Down Fast, Voyager passing through on the Up Fast and a freight on the Up Slow. There are obviously other permutations etc. but I think the maximum main movements at any one time will be four trains which means four drivers and therefore four controllers.
Being wireless is a great feature as this gets rid of the wires on the loft floor and enables the driver move with the train as it trundles around the layout.
On the number of locos on the layout at any one time, having a limit of 40 is not a problem. For example, five DMUs, one HST, one Voyager, two freights and even say ten odd locos at the depot still leaves you well below the 40 limit. It would be nice however to have the ability to put a loco on the track without having to delete one from the roster and then add the new one. Not the end of the world though.
Having quite a few locos on the layout does require more power and so I do need to purchase a booster.
The other major factor to consider is the cost, as I already have one handset would it be cheaper to just add the Pro-box, booster, another handset etc. or switch to a comparable system which fits the bill? I don??™t know.
Not being an expert on DCC I cannot really think of any other requirements. It may well be quite a while before I even attempt to run the Grimley timetable with four drivers. May need some drivers and a signalman!
It would be nice to be able to have a drive of something at the same time as my eldest. Don??™t seem to get many goes at driving these days??¦??¦