I had an outdoor gig yesterday and both my SG Classic and my SG Standard refused to hold tuning. I've had tuning issues before, but nothing compared to this. I dropped significantly out of tune on almost every song. I think a lot of this had to do with how hot and humid it was, but I'm wondering if I should get some new tuners, maybe locking ones. Will this help much with weather related tuning issues? And what tuners do you guys recommend for SG's?