Hi John and Don ,thanks for taking the time and trouble to reply to my question it is most appreciated .
I was just thinking, could it be done by setting up 2 performance list /registrations one with a slow rotary organ and the other with a fast rotary (both would include the style acomps set up for "whiter Shade of pale " and get it to operate uy using the FC7 footpedal by operating the "next /prev " performance foot switches and just alternate between the 2 functions as and when throughout the song .

regards ....Giovanni