DavidP
Friend of Leo's
Put in a push-pull pot so you can readily disengage/engage the bright cap.The DRRI can be fussy with pedals. If you can get somebody to lift the vibrato channel's bright cap, it might open up some more possibilities. A lot of players like this mod and, if done right, it can easily be reversed.
WRT overdrive, you simply can't go wrong with a Barber Gain Changer SR -- its an incredibly versatile pedal!