Hey Dave,
Sorry to be so thick but if I send you €15 does that cover shipping? The wording on your page there is a titch vague. I'm still in the States.
Also, was reading about your hassles trying to get a good hard D with that old chanter. Just the other day I took out two little bits of brass foil I'd put in the throat of my Patsy Brown chanter years ago, to cure the motorboating hard D problem. Couldn't remember if they were still in there, actually...sure enough there they were. Replaced them with a much larger bit of cardboard and it almost completely killed the motorboating problem. Unfortunately the 2nd octave is now a bit flat. I could take the cardboard out and toughen up the reed of course but am a complete weeny, to put it mildly.

But plan to try various sizes of cardboard and see what happens. It's all kind of lame, making up for the wood the pipemaker should have put there in the first place, but what are you going to do? Patsy Brown didn't plan on the thing speaking at A=440 in all likelihood either, hence the rush and bits of electrical tape.
So, give cardboard a chance, if you haven't. You say you put a bit of wire in the chanter reed staple to give the same effect - that's something I do all the time with reg reeds - bit of bent paperclip. Have a little plastic 35mm film cannister full of the things, of all lengths. Mutes the reed too, but that's not what you'd want with a chanter reed, I'd think.
That chanter had a bit of a problem with weak reeds giving a false high E, but I figured out last year that a bit of wax in the Eb hole kills that problem too. So, progress, it's only taken 15 years of messing around too...

Journey not the arrival, you know.
Congrats on yet another record, too. Those pipes are something else.