Unstable low a with Morrison chanter

Got F.Morrison chanter quite nicely in tune, but low a is abit unstable(must put piece of tape on low g hole too)… quite sensetive with pressure vs pressure with other notes.
So open reed abit with pliers on the wirebridle …or ..good suggestions before it
M

Is it the smallpipe or border-/reelpipe chanter?

Definitely talk with the maker. These reeds and chanters are very sensitive and probably behave differently form uilleann and other reed/chanter relationships.

Don’t use the pliers. If you want to open it up use JUST your thumbs.