Edit: I'm now seeding https://archive.org/details/the-gbp-25-000-pre-amp-that-went... Enjoy your Streisand Effect.
> which the manufacturer claimed ‘could not be fixed’
which Mark definitively proved wrong. But also, he doesn't have to explicitly disparage the equipment if people can just look at it and make their own conclusions. Even if the actual design is sound (I'm not remotely qualified to judge), you have to admit it looks a bit janky.
As for valid copyright claims, you're probably looking for reason where none exists.
magnet:?xt=urn:btih:600efecbcd0e270661c3f4ca0604b03a3b4adabd&dn=the-gbp-25-000-pre-amp-that-went-wrong-tom-evans-mastergroove-sr-mk-iii-rjbp-fsfzi-i&tr=http%3A%2F%2Fbt1.archive.org%3A6969%2Fannounce&tr=http%3A%2F%2Fbt2.archive.org%3A6969%2Fannounce&ws=https%3A%2F%2Farchive.org%2Fdownload%2F&ws=http%3A%2F%2Fia601500.us.archive.org%2F17%2Fitems%2F&ws=http%3A%2F%2Fia801500.us.archive.org%2F17%2Fitems%2F
I posit that you could use 10% resistors, and it would work just as well. The individual gains don't have to be exactly the same, since they're all being summed anyway.
Oh, and those plastic stand-offs really need to go.
This reminded me of an old advertisement which compared a component stereo amplifiers specifications to that of a piece of wire. I spend almost an hour looking with google, etc., and I can't find it. 8(
Oookay. But ironically fitting somehow.