Thanks again, even though I have hundreds of real tracks and prefer Neil Swainson's bass for example (a friend and mentor also), they take too long to load on my old box, and I have a New Year song list to work on, so I just use the midi Simple jazz style, and add my own flavours to the bass line which I print out. Most styles have bass lines that are too busy, too many approach tone and ghost lines, so I just add them where I want while rehearsing. At the gig I just use a chart of chord symbols.

Dallas