Have not seen Doug here in a few . . . hopefully he is busy on the new album
I have a GB shuttle 3.0 - and just laid down a few tracks with the DI. It is very clean, and the engineer was more than happy with it. In fact we made plans to re-do all my previous tracks on this album with the new head. I would expect more of the same from the 9.0
For his basses . . . . Pedulla MVP
go to Doug Johns | SuperFunky Bass Music
and he gives a pretty good run down of his gear. He also uses DR Sunbeams (his site has the gauges).
hope that helps