Gibson SG question

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: Took a month to locate one at a price that has not been inflated (they are now £699 from £500) but I am now the proud owner of a Ebony SG Special MMmmm. Man it is loud compared to the Squire that I have. : The Gig bag is a lot better quality then I thought it was going to be and it plays really well, as far as I can tell, not been playing long but I have lesson in a couple of weeks and going to let my teacher loose on it. : 2 quick questions though, how much "play" should there be on the humbuckers because they move about. I presumed it was because there was no covers. : and : When in the middle switch position it "blends" the 2 together but if I switch either volume down to 0 it knocks both out is that correct? : Thanks