Here's some recent pics from the Montreal Jazz Festival back in June, and it looks like he's playing all Ampeg stuff... no Fender Pro Reverb to be seen.
http://www.worldwidescene.com/tag/return-to-forever/If you click on the first pic at the top, it blows up to a GIGANTIC pic and you can pretty much read the settings on his amps.
Here's the direct link...
http://www.worldwidescene.com/wp-conten ... Fiv.11.jpgMy gut tells me that the amp wasn't his and that it belonged to the keyboards or was used as a guitar monitor for the other guys or something... but I guess anything is possible.