Good question, on Better the synth solo that runs in the backround of the guitar (around 0:50) and on the last chorus (1:45) sounds a bit like the synths on the Blues (live from Pittsburgh) and I think those were performed by Pitman.
But doesn't Dizzy do that type of shit as well? Even Axl? If memory serves me correct, there was some snyth on AFD, and of course UYI as well.