Nigel, now I'm really curious, could you clarify how you used copper pipe up to the gauge please? How did you cope with the steering lock movement by putting pigtails in the run? I was going to use flexible plastic tube because I didn't think the copper would survive the frequent steering movement and copper loops would not have looked very neat. The next point is that, based on various sources of gauges and fittings, it looked like the thread to tap into the casing needed to be 1/8" NPTF-27tpi., so I have the tap ready. Am I missing something here? Thanks. Alan.