I second the need for an additional set of drawbars so I went out an added a Roland VK-8M to the already overcrowed PA1XPro, Ketron X4 (some additional sytles and accoustic voices) and Roland 5050 (primarily a good layered piano sound). The addition of the VK-8M has given me the very close to B3 sound and by spliting the PA1XPro keyboard with a Jimmy organ on the bottom, I've had numerous comments as to "where is the B3"? and "I don't see the leslie...but I do hear it." You just may want to look into the addition of a VK-8M.
Art