Bright switches each for the Crunch and Lead channels, a Wet/Dry voicing, shape control, boost, master voice for normal/tight, etc. Most if not all of that is pretty much standard now. I had a solo boost put in which is the the big knob above the Main volume. Don't really use the solo boost though because I had some later modifications done to it and tend to use one of the dirty channels as a solo boost instead. I wasn't really using the Crunch channel so Dave did the following for me, basically making it like an EL34 K88.
Changed out the Crunch/Lead switching system to the K88 Gain A/B system so both are identical tone wise.
Changed the wet/Dry switch to add the clipping circuit aka Cameron style. It can be switched ON or OFF as desired.
Tightened up the bass just a tad.
I am certainly not the end all of tone connisseurs so don't claim this is the best way to go but it works better for me. He's had people request the reverse done to their K88 so to each his own. I can certainly say though that both amps are really nice.