... pull travel. But not very practical on an exhibition layout -- use a spring or an elastic band. cheers, Martin. posted: 20 Aug 2020 21:56 from: Andrew Barrowman Yes, wire in tube works quite well. I have been known to use Woollies spring curtain wire and the strings from an old piano. Unfortunately my layout is 29 feet long and I have ideas (sketchy) about automating some of it, should I actually live that long. Anyway, this is what I'm on about. 2983_201603_060000000.jpg The control panel has a single pole make/break switch for each point set of points. That controls a cheap 2-pole relay mounted locally at the point turnout. The 0 volt connection to the relay could be your track common-return if you use that method. One pole of the relay supplies the frog and the other pole selects short or long pulses to position the servo. There is a pulse generator local to a cluster of turnouts. That's to keep the servo signal connections as short as possible to ...