Im really sold on these amps!..Ive watched around 40 demos on YT and not ONE actually demos this Foot Switch showing the display and takin it through the 3 modes of operation. The Manual is pretty vague as well.Being an old 60s/70s Guy new to digital workings who lead sings while playing ,Im wonderin if Ill be able to use this effectively in during my show?. A video showing "How" this contraption works would be PRICELESS!!!...Just wonderin if anyone here has used this LIVE during a gig in Preset mode? ANY info would be appreciated.