Just put this idea together this morning. The amplifier isn't very loud in this recording but I do think it produces a nice sound in combination with my Gretsch. Would you agree?
Is there an overdrive pedal in your signal chain? The raunch is nice but there is a nasty/gritty harmonic overtone going on.
The organist needs to introduce more variety via drawbar adjustments, drive, rotor speed and percussion/click. (Somewhere between John Lord and Belmont Tench.)