Nice work Dave. Justin's touring rig/board used to be a mess! I like what he does with the Piezo configuration. A guitar player can definitely fill up a room with this. Great guitarist.
This is really cool. Mark do you have any pics of the back of his 20th? I'd like to see where or if he even uses the excursion. I would assume he doesn't judging by his tone settings. Gain maxed and bass past 12 o'clock has plenty. Also is his 20th KT88's or EL34s? Mine is EL34 20th and I can't get that clear and smooth of a sound with mine. Mine is really biting and congested in the low end and not hear as creamy and clear sounding like his. Amazing tone.