Thank you Aggravation. So if I am hearing you correctly, the "Tight," "Loose," "Zero," and "Resonant" choices refer to the original topologies? Tight would be American Clean, Loose- British Crunch, Zero- British Chime, and Resonant- Modern High Gain? Of course I can then choose Class A or A/B and Pentode/Triode on top of that. Let me know and thanks again!