one of the most ubiquitous notes the 'border' pipe chanter has is the high G#. A lot of tunes in A actually need this note, and standard pipe settings have suubstituted the Gnatural to porr effect. Loo at The Ale Wife and Her Barrels [in the LBPS Blue Book available online on this site]. The 2nd strain should have g# throughout, except, and this is the fun part, the 7th note in bars 2 & 6 [of strain 2].
Another tune in this collection that really gains from having the high g# is The Wood of Fyvie. I play all the high G's as sharp.
The version of 'Dei'l Stick the Minister' in the LBPS 'Pink' book is an attempt to arrange the original modality of this tune to the pipe chanter; it uses C natural throughout. There are a number of other tunes in that collection that benefit from high G# in places. The trick with these 'double tonic' tunes in A and G is to use the high g# when the tune is in the A 'tonic' and the G natural in the g 'tonic'. Most of the 18th fiddle settings of these tunes do this, even those that remain within the pipe range.