Eben Levy wrote in message <364FDC15.33A91C2C@ozemail.com.au>... >Well, then you still need some sort of keying if you have one train in the loop >and want another to cross it going the same way. Nah - the crew of the first train can work the points at the entry to the loop for the second train. David "The Doctor" Proctor daproc.spambait@umpires.com