I have come upon a fair bit of money and was planning on buying a really nice tube head but then realized i'd rather make my own. So i began brainstorming ideas and came up with a basic concept of whati want. I then proceeded to start to schem out the pre amp section, and i was wondering as i have seen it in many different positions. What affect would putting the eq before, in the middle or after the preamp tubes have on the tone.