I don't know how much redesigning Peter has done but my pipes are a set by Pat McNulty and Peter Hunter when Peter was learning from Pat. My understanding is that Pat's chanters leaned heavily on Leo Rowsome's design. Logically that would make it Peter's starting point as well......but the set was made over 30 years ago so a lot of changes / refinement in design are likely to have taken place since then.
I would like to point out that this is a different Hunter, one who worked (I think) in Glasgow. It's not the first time this confusion has arisen, I remember it with a "Hunter" double chanter which was the work of the other Hunter and not of Peter who wasn't making pipes until 1982 anyway. Peter's pipes are based on a number of different classic makers, some designs tweaked so much that the original model can't be remembered.
The flip side of the Browne comment (which he has also made to me, I hope he doesn't mind me saying publicly) is that, when pressed, Peter named Ronan as his favourite living piper . . . . .
We aim to begin marking our pipes soon, we are currently engaged in training the woodpecker to do the date in binary.