... sheet, gapped in a "cross" to produce a strong mechanical join, but also keeps all 4 rails electrically separate. A bit crude but quite effective I hope. Incidentally, I don't recall whether I mentioned this before, but I gapped it with a Dremel/ abrasive stone which I feel is better than a file or saw as it gives a wider gap( more reliable isolation?) and less likely to weaken the paxolin, and its quicker! All tested with a metre to check lack of electrical integrity. 2787_292330_500000000.jpg Sorry about the picture, it came out sideways. Martin if you felt like it, would you mind turning it round? Cleaning up the joint with a brush loaded with a water meths mix kill the flux residues. 2787_292353_150000000.jpg Mirror alignment checks 2787_292359_400000000.jpg Checking the alignment of the curve with a mirror during the soldering operation. Why does this work so well in identifying poor alignment....? An overview of my progress this weekend. The two lengths disappearing underneath the station are just laid in place for the photo ...