Can I use both at the same time?? I am planning to buy a vt pre, I have sadowsky pre I want to use the sadowsky like a preamp and add some overdrive with the vt preamp, can I do this without changing a lot the tone I get with the sadowsky pre. I like the sadowsky pre alone in some songs, and I need to add some overdrive for some parts with the vt more as an effect. Is this possible???