I'm curious if there's a way to run two preamps, and switch between them with a footswitch. I have a really nice SS preamp, and a very cool tube pre thats very tubey gritty sounding and I was thinking about putting them both in the rack and being able to toggle between them for different sounds. Is there a way to do this, and more importantly, is there a way to do this without suffering from signal degradation (from splitting and recombining). They would have to sum at the end and go into one input on my poweramp. Thanks!