I've seen several Boss OC-2 Octaver pedals on ebay & reverb that have screws in the knobs which leads me to believe they're inauthentic (at least the knobs) as I don't believe Boss ever used knobs with screws or am I mistaken here? I have an OC-2 Octaver from 1983 & a OC-2 Octave from 1987 & both have push on knobs, no screws. If someone can shed any light on this I'd appreciate it.
