hi reptile
well the phase keith used to play from the late 70 is the mxr phase 100, not the 90.
don't think he does right now on this tour, anyway i remember a shattered version from some years ago (maybe 97-98) in wich keith used a phaser. About the distortion, i think keith always used the amp's one, earlier with the ampegs, later with the mesas and now with his fender twins. No distorion pedals as far as i know (exept the famous fuzz while recording satisfaction). the delay sound you can hear on undercover, er, tattoo you is given by the mxr digital delay wich both keith and ronnie used that period (on the 81-82 tour too.) The "liquid" sound you hear on fool to cry, coming down again is keith using his phaser with a wah-wah pedal. that's all i know about it