There is a pipe and drum band which appears at the week long folk festival I attend, and although they all wear the same tartan is is in different shades, some kilts are pleated to the stripe and some to the sett, plus they are of different qualities, some are very heavy, some are thin PV, and the size of the sett is different.

Personally I think that what they have looks more irregular than having different tartans, as they are obviously intending to be the same, and failing.

With the cost of kilts and bagpipes, or a good big drum, it must be quite an undertaking to get the uniform and instrument.