Johnny DeMarco has a lot of demo videos of Boss gear. Some time ago I found this video where he plays a tapped version of the Entertainer: http://www.youtube.com/watch?v=zS8Q5Tn0mRw
I had a JC-120 in the late 80's/early 90's. Great amp. One of the ones I wished I'd kept. :( I didn't care too much for the built-in distortion, but the chorus effect was outstanding, and the amp has an awesome clean tone.
Dan
"The only way I know that guarantees no mistakes is not to play and that's simply not an option". David Hodge
Dan, I know how you feel. I bought a JC-120 off of my brother 20+ years ago. 13 years ago, when I was getting to move the family a few states away, I did not feel like lugging the beast along so I sold it. I kick myself every few months :cry: