Gotta love when the fancy $400 meter gets outsmarted by a brick from 1965 that probably survived a few drops off the wing. Fluke sees radio noise and just starts making stuff up like a drunk guy at a bar telling stories. Meanwhile the Simpson just sits there all calm and points at the actual problem like it's not even trying. Twenty minutes with the old needle vs however long you burned chasing ghosts with the digital, that math does itself. Keep the antique, it clearly knows things the new stuff forgot.

Sounds like you had it backwards, because a 60 degree angle actually gives you more capacity than a 75, not less. Wider angle from the vertical is what cuts your WLL, so maybe the real fix was something else he changed.

Wait until you find out about the salt scrub trick, it NEVER fails.