in an old YT video, one of those Las Vegas Guitar guys explains his theory on sorting guitars. he lays about five guitars down and lifts each guitar by the headstock. he strums the strings, one or two guitars are stable and the others are not as stable. he doesn't really explain which ones he would choose, his story is he hand picked guitars for Famous Players back in the hair metal days. do any of you guys know what he is doing? is he looking for a stable neck or a slightly alive movable neck? when a player sustains a chord and wiggles the neck, you get that cool 70`s end of a solo vibe, I can see Page doing it now in my mind. is that what this guy is looking for? or is he looking for a super stable neck? he doesn't really explain what or why he is doing this. (he is the same guy who posted a video about the Gibson Flood back in 2010, asking "who made the gibsons in 2010?" if anyone has seen that video) I have tried this with my guitars, the neck through is solid, the glued in neck (hamer Special) is no where near as solid and the strats are all pretty stable. anyone aware of this bench test?