Play since around 1960. Tested just about any guitar and amp and pedal there is.
Since 1986. at the Swiss Federal Institute of Technology at lausanne (EPFL).
See my band 'Tsha-Coo' performing live: https://www.youtube.com/watch?v=C5Fx05Drt0A
Or my RMC Gibson Les Paul singing: https://www.youtube.com/watch?v=g1QVJ2VrhOo