The D&G string tree normally gets installed level with the A tuner. But if it's pulling the strings down too much in that position, you could try adding a spacer so it sits a bit higher, rather than add another hole in the headstock. If you've got nothing suitable to hand, you can drill out a ball end from an old string so that the screw will fit through, and use that as a spacer.
Last edited by Simon Barden; 19-04-2018 at 09:32 PM.