Im pretty sure Steve didnt have rack gear, im sure he used the amp like normal. Thats why Flex-able has such a beautiful raw tone.
I think his rig was basically:
1970's
Fender Strat w/ Dimarzio 2XN -> Boss SD-1 ->
Dunlop Crybaby -> Carvin X100B
How are you liking your Carvin otherwise man? Im SERIOUSLY considering buying one. Ive never played one, but from what I hear on Flex able, I like the tones.