You can learn a lot watching Gospel players. They use everything on the organ to the max. Chorus, Leslie Fast/Sow, Drawbars and Dynamics. A lot play "reverse" with LH on Upper and RH on lower.
I love that stuff and would wish I could play as expressive as they do.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer