I liked the idea of magnetically switched coach lighting as fitted in my recently bought LNER Dynamometer car so much that I've decided to experiment myself. I could always buy 'Function only' DCC decoders, but with a stock of about 35 coaches, that could work out quite a pricey option, so instead, I'm going for the magnetically operated reed switch method. There are a number of sellers of 3 pin NC/NO (Normally Closed/Normally Open) small glass reed switches quite cheaply (£3-£4 for 10) on that certain auction site, so with that in mind, I've ordered 15 to start with and we'll see how it goes. I'll hopefully be able to use the 'Magic wand' that came with the Dynamometer coach to do the switching, although I could easily make more up if needed as I have a stock of 3x3x3mm Neodymium magnets, and the reed switches themselves are easily capable of switching the low currents of the coach lighting, and it'll be useful to be able to switch the lighting off on coaches 'parked' in sidings etc and it will also reduce the total current load drawn from the DCC rail supply when coaches are not in use. I anticipate using small sections of Veroboard (stripboard) to mount the reed switches onto, gluing them into each coach roof so that I can just wave the "Magic Wand" over each coach roof to operate as needed. I'll likely do a "How-To" as and when I receive the switches, so 'Watch this space'. Keith.