hehehe yes thats right boys and girls remember to wear your rubbers when exercizing your knobs with your feet ....
you get the big MXR size knob and the rubber thingy and have at it....... ( oh and for the younger guys - this is a very old solution - most of the original MXR pedals came with these on them - works great on Delay times, flanger/Phase 90 speeds etc...)
Yeah using the MGMV this way helps to justify the board space alot easier - its a full time enhancer that also modualtes in a very cool way sometimes....
I think most of the later ones have a little trimpot inside so you can adjust this to your situation...