the other day i tried a late 70's big muff and compared it to a reissue big muff. the vintage muff in my books was a much better sounding pedal... much smoother and creamier than the reissue. however it was very temperamental. even in the store. it would work. then it wouldnt. the tone knob would work. then it wouldnt. what is the reliability like in old big muff's. if i bought an old one i would still gig with it/ so it would have to be better than one i tried. what has your experience with vintage big muff's? thanks, mark.