tootler,sorry if I appear to be steamed up,THIS MEDIUM [where we cant see body language can be misleading]. I have been playing concertina for thirty years,accompanying songs,have written 2 tutor,one of them on song accompaniment made 5 lps and two cds,while I admit I am still learning[arent we all].,My concertina accompaniments have in the past been complimented by such luminaries as Brian Peters and Louis Killen. in my earlier post I said occassionally I use parallel thirds,By trying to avoid them, im looking for alternatives,that doesnt mean I wont use them,. I mentioned this because on CONCERTINA NET,someone suggested to a beginner [use parallel thirds and any other note that fits].Ibelieve parallel thirds can be used but are best used sparingly.if you visit my website,www.dickmiles. com you can hear two of my accompaniments Sailortown AND Just as the tide is flowing,which I hope you willenjoy Dick Miles