Thanks for clarifying things John. It may seem odd that I a bagpipe player should be interested in this, but I have a "Bardic Harp" that I made from a kit and it uses Guitar strings. The tension is quit important; at the gauges supplied it produced a very sad boyoying noise so I put the tuning up a tone and that fixed it. The problem is that (in order to know where you are on a Harp) a steel wound string is introduced among the phosphor bronze to indicate octave and fifth, which are now on the wrong notes. I should be able to work out appropriate gauges for the strings from your info. All the best PP.