Just got a few q's, i bought some new machine heads for my epiphone G400, i got some Gotoh SGV 510's, will these fit on the G400 in terms of the hole size?

Also, i got a Seymour Duncan SH2 Neck pickup, are the factory g400 volume and tone knobs suitable for this pickup in terms of there electrical properties?

RG's & Mesa's
1. not sure
2. yes
My Gear
-Gibson Les Paul Tribute (Bare Knuckle Nailbombs)
-Ibanez "lawsuit" Les Paul (Seymour Duncan Pegasus and Sentinent)
-Ibanez S470 (Dimarzio D-sonic and Humbucker from Hell)
-PRS SE Custom (Guitarforce Black Diamond and Lord of the Blues)

Marshall TSL100
EVH 5150III EL-34 50w
Marshall 1960a cab

Dunlop 535q wah
Boss Super Chorus
Bogner Uberschall
Ibanez DE7 Delay
Electro-Harmonix Power Booster
Fender PT100 Pedal Tuner

Ernie Ball Skinny Top/Heavy Bottom 10-52