Iain,
Heh, I wasn't really asking for advice on the track plan, just checking on how to wire up the reversing loops especially in the Digikeijs/YaMoRC world. This track plan is verson 60, so it's been going on for a while now.
The whole layout is loop-to-loop over 2 decks. There is yet another staging yard underneath for the other end of the mainline. iTrain or TrainController needs to know about all of the tracks with Railcom detection.
Your answer is not the greatest news, but one I really needed to be confirmed. If it's impractical to put lots of detected blocks inside a reversing loop, then it looks like I will be buying a lot of DR5013's (or the YaMoRC equivalent if/when it becomes available.). This brings it up to around 12 units.?
I've not seen anyone else recommend the short-circuit switch mode, so your comments were useful. Thanks.
Oldngrey