Going back to the B3 days I had the Rhodes on top but then with my first Hammond clone the organ went on top of the Rhodes. I agree LH bass is a lot easier on the lower board but did you ever notice how much the Gospel players play LH on the upper Manuel ?
If I was to use the Seven I wouldn't bother with those spindly legs but put it on a table style stand with adjustable height.
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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