Dick
To my knowledge the concertina has never really been a feature of traditional music in Kintyre, and I think that historically, the melodeon and two-row button accordion were probably more popular for home entertainment.
As you know, Kintyre has a very strong piping tradition, and over the years has made a contribution to piping which far outweighs its relative size by population. When I was involved with piping in Kintyre a good number of years ago, the standard Great Highland Bagpipe was the only instrument that was used, but I think that some local pipers have taken up the smallpipes as an option for playing indoors. I believe that there has been a general national trend in recent years towards smallpipes, probably promoted by some excellent prominent exponents, although nothing will overtake the phenomenal worldwide popularity of the Great Highland Bagpipe.
Interesting photo, and I note that you had Duncan Dyker in your band. I have known Duncan for a good number of years, as our paths have crossed on numerous occasions going back over a good number of years, principally at the National Mod and Fiddlers Rallies.

Maurice
Merda taurorum animas conturbit. Quidquid latine dictum sit, altum videtur