I love the sound of the mini-humbuckers in my '63 Crestwood Custom--kinda like a strat w/balls (pardon the expression!) or an Lp w/ cut. What do you guys & gals think? Were the same mini-hums used in 60's firebirds? They don't really look the same. They look more like the hums used in a 70s LP Deluxe. Are they unique to vintage Epiphones?