Any music string of the correct gauge is suitable. If a wound string is to be replaced the windings have to be removed so that only the core sits on the bridges.
Great to see some of Tom Walsh's tunes travelling! His is a wonderful fiddler and a really nice bloke! Our band (No Such Thing) plays this in a 32 Bar Reel set with Colin Charltons Reel and Soldiers Joy.
Any music string of the correct gauge is suitable. If a wound string is to be replaced the windings have to be removed so that only the core sits on the bridges.