Re: NGD
The SR is the Sprint Run, it's a limited release- no robot tuners, it's got locking Grovers. The neck is amazing, thin asymmetrical, great if you're used to shred sticks like Jacksons, plus it's got a compound radius board.
The brass zero nut I love, I wanted ultra low action like I have on my PRS and EVH, and with a quarter turn of the Allen screws on the nut, and 5 minutes, I was able set the nut and bridge to the exact heights I wanted to get it to play like melted butter. Since the brass wears out quickly, if you call Gibson they immediately send you for free the titanium replacement nut.