If you like Mr May, this month's Guitarist Mag (issue 309) will be essential for you as there is a 10 minute video of his tech Pete Malandrone going through his stage rig.
Looks expensive.
9 modded AC 30's with his tech working everything for him during the show except the wah and tuner mute.
Brian has his treble booster attached to his guitar strap all show so it is 1st in the chain before the wireless unit.