i will try to phrase this question to make some kind of sense.i love my mark 4...although it has taken me a while to understand the ins and outs.there are so many factors that alter your tone...i guess the point i am at now,i am struggling with the use of the simul-classa...the pentode-triode...and the mid gain- harmonics and full and tweed power switches.should the use of pentode-simul-full give me more punch?should i lose the slamming dimebag darrell type of punch using triode class a-tweed power.i am in the process of experimenting at gigs and sometimes i feel my ears might be playing tricks on me.thanks for any input.