Re: Carvin technique
I've got 2 carvins that have the wilkie/graphtech nut and one will stay in tune no matter how crazy I go on it. Dive down till the strings are like spaghetti, pull back till the trem touches the body, flutter all day long, nothing. rock solid returns back to perfect pitch.
The other one though, nothing on this planet will allow it to stay in tune. It woudl return from a dive or even just light tremolo use sharp on most strings and if I pulled back, they'd all be flat. The strings pinched in the nut and no lubrication or filing could fix it. Even tried an LSR roller nut and it STILL wouldn't stay in tune so finally I said screw it and blocked the trem, installed 5 springs for as much vibration transfer from tremolo to body as possible and left it be.
Oddly enough, carvin still sells guitars with floyds with a graphite nut. Some claim it stays in perfect tune but to me, a floyd on a guitar with no locking nut is like a neutered dog.