I contacted Wayne from Boulder Audio, he is not doing any mods on the side anymore. He said the Touch is superior to all models prior.
I've been reading about the SB Touch and that seems to be the way to go. So no longer have any interest in modding my SB Classic. I just read an old review of the Touch in Stereophile by Kalman Rubinson (Oct. 2010) and he loved it even in stock form. Some good info in that review, including a way to modify it so that the USB port, normally for input only, can output to a DAC.