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[Pierre Von Mondragon]

But his answer would be, its not a '59 Les Paul. Or, get a Dano.

9s are ace, like a compromise between 8s and 10s.

[HateEvent]

Seems you have already done all which I would have brought up (checked machinehead tightness, restrung properly, stretched in strings, graphite to the nut).

The only other thing that could cause slipping as well would be if the nut slots have been opened up incorrectly from varying string gauge (I've seen many examples of people putting heavy strings - 12-56 for example - onto guitars that have the nut opened up for 10s.). This would cause some trouble. Normally a needle file is used to evenly open the slot rather than letting a thicker string dig in and opening up the slot in an unbalanced manner.

If you are still struggling with it, I can easily have a look at it either in or outwith R&B if you like.

[The Sloth]

Originally Posted by HateEvent

The only other thing that could cause slipping as well would be if the nut slots have been opened up incorrectly from varying string gauge (I've seen many examples of people putting heavy strings - 12-56 for example - onto guitars that have the nut opened up for 10s.). This would cause some trouble. Normally a needle file is used to evenly open the slot rather than letting a thicker string dig in and opening up the slot in an unbalanced manner.

ooops! Ive done this quite a lot.

[HateEvent]

I know from experience as well dude - the Moon Explorer got a set of 12s for C# once and, when putting 10-46 back on for E, it caused major rattling with smaller gauges ever since.

The small period of time in which I owned it with 12-56 in E made me feel very manly though