... : I wasn't thinking of using either tortoises or Meccano, at least not unless all the above fails and I end up with egg on my face! Hi Andrew, Does that mean you have now found satisfactory answers to your problems in your message: topic 2547- message 25595 cheers, Martin. posted: 9 Sep 2018 20:02 from: madscientist having reviewed both, I found the switching in cobalts to be more robust then tortoises posted: 9 Sep 2018 20:06 from: Andrew Duncan Well a wee update 2787_091458_260000000.jpg Yup as I said to Jim I do need to be neater in my approach to wiring. Anyway I've now finished splitting this board into 3 districts and compared to muddle I had before I now stand a sporting chance of finding electrical problems as I can now switch off each district separately wooow!!!! Other wise you can see the Megapoints plug and a hole where the track power din plug will go when it arrives from RS. Oh and the din plug for the Megapoints power. Food calls. Andrew posted ...