Doctor Rock Demo Les Paul by GuitarPCB.com published on 2012-08-09T06:21:21Z Demo by Barry. Les Paul into a Twin Amp with Reverb. Comment by GuitarPCB.com Gain Knob adjusted to 100% Full Up! 2012-08-09T06:24:16Z Comment by GuitarPCB.com Engaged with Gain at 70% 2012-08-09T06:23:19Z Comment by GuitarPCB.com Bypass 2012-08-09T06:22:47Z Comment by GuitarPCB.com Engaged with Gain Knob at 50% 2012-08-09T06:22:23Z Comment by GuitarPCB.com Bypass Signal Les Paul into Twin Amp with Reverb 2012-08-09T06:21:53Z