How on earth does Angus Young (AC/DC) keep his Gibson SG in tune?

[WestSide™]

I had a Gibson '71 reissue and it was difficult to keep it in tune.

 

[WizardMerlin]

Because he's the fucking man.

Besides, it's very rare he uses a whammy and he has something like 7 guitars backstage.

 

[Sean]

He uses an Electronic tuner, on Earth. How he does it elsewhere, I dont know.

 

[Mon]

He has a guitar tech to do it for him.