First I do the switching with a Rocktron Midi Raider and have it connected with a Hex Pedal.
My guitar goes into a Wylde Wah, EVH Phaser, EVH Flanger, Lehle Sunday Driver SW, TS 808.
In loop the old crappy GMajor and in the tuner input the Korg 1000.
Personally hate the GMajor but I need the internal switch I can control via midi, so I can switch the second channel +/-.