HI Ive been playing A440 ghb for quite some time. I actually keep 3 ghbs in rotataion, one at band pitch, the next in Bb 466, last in A440.
My A440 setup is MacLellan chanter, medium gannaway zip & airstream with bottle tube trap.
The drones are Hutcheons: but I only use bass and one tenor.(get to reasons why in a min),
Theyre reeded with standard Shep SM90's, with custom extenders i made myself out of brass tubing. The extenders are hotwaxed into the drone reed seats using thermowax. (I melted a gob, slathered threaded brass tube end into it & jammed it into the drone bores.)
For a long time i tried this & that to get the tenors to lock , but at that extreme length they simply wouldnt. But using one tenor & one bass only, tunes up just fine with the chanter.
Straight cut chanter reeds need a longer profile, often down to the binding, to get comfy at A440. Mine will currently do all the auxillary tones except high B. theres plenty of stuff out there with me on this setup if you want to check it out.
I like to think what listeners hear is "wow a bagpipe that fits in with other stuff"

But the biggest change I had to get used to was tuning the scale more towards tempered intonation instead of the "purer" intervals of solo piping.
Couple years ago I had the not-so-bright idea of a lower pitched Pipe band, close as possible to Bb 466. There were enough chanters (like hardies, for ex) that got down there without too much complaint, but we had such trouble with drones, even with older sets like Glens, Thows etc. that it just go to to be too much of a pita on gigs.
PS I make sure the backing band always learns the ACDC tune in Bb

let them do the work for a change, if ya know what i mean...
