I am using a couple of Boss dual footswitches. That gives you four relays to control something on the RK. Channel one is the default so I have the foot switch plugged into channels 3 and 4. I also use the other footswitch to control a loop and the solo function. I you want to get crazy, you could get 4 foot switches and be able to control all the functions. But then, you are getting into mucho pedal territory again. I plug what ever I need for that particular gig. The other option, which I am setting up at the moment, is a Line 6 M9 into a Mini Amp Gizmo into the RK. You don't have to use an M9. You can use some type of Midi foot controller. There are a number of them out there. The nice thing about using the M9 is that I can change my patches and the channel on my RK at the same time. No more tap dancing. My next deal is to get a T.C. Electronics Nova Drive and get it to change the presets with Midi also. Good Luck.