I think someone on here had asked about Trey's settings on his MKIII. From what I can tell from some pics they are:
Volume: 4.5
Treble: 5
Bass: 2
Middle: 5.5
Master: just under 2
Lead Drive: 3
Lead Master: 5
Reverb: off (not 100% on that)
EQ: Auto or off, making the "upside down V" irrelevant except when the Lead channel is on (off as in the middle position)
1/2 Power (at least in one pic I saw)
I'll try to remember to post the 3 pics I used to confirm this. 2 were from here (http://www.proaudiostar.com/phish (http://www.proaudiostar.com/phish)) and when you blow the pics up you can get a good idea where the knobs are based on the spaces in between 10 and 0. I have another too, not sure where I got it though.
Here are some pics. I tried to blow them up for ya but it was taking way too long.
(http://i135.photobucket.com/albums/q127/shakedown_04092/Trey-Guitar-Amp-And-Rack-660x440.jpg)
(http://i135.photobucket.com/albums/q127/shakedown_04092/MKIII.jpg)
(http://i135.photobucket.com/albums/q127/shakedown_04092/Guitar-Languedoc-And-MK31-e1277925147207-660x990.jpg)
Nice work - I would agree with those settings after doing an extensive review of pics as well. I have seen some variation though, most notably a couple pics with the lead volume higher and lead master lower, which I tend to like - it gives a more rock/aggressive lead rather than a more fusion style lead (to my ears and playing). Treble that low can be dark - I like how smooth it is, but I sometimes open up the treble a bit, especially with my classic rock band.
I actually have mine set the same as you mentioned. My Volume is at about 6.5 to 7 and the Lead Master is about 2.