Ever since I tuned my 7 string guitar to D standard with a drop G, it has been playing funny. Dead notes, fret buzz on the low two strings. I’m so tempted to take it to a luthier or guitar tech but learning how to setup guitars is fun, though I am terrible at it. I’ve adjusted the action, adjusted the truss rod, first for more relief, and then almost undid everything I did except for maybe an 1/8 turn. No joy. My next step is to try adjusting intonation.
I really should put some fresh strings on it. But it’s such a pain in the ass and I am bad at it.
I have another 7 string, with a Floyd Rose on it, and this is nothing compared to that beast.