Woe betide the psychedelic groover who picked up the third album by Status Quo, dreaming of further picturesque matchstick messages! A mere three hits in a long three years had completely exhausted the bandmembers' patience with the whimsy of yore, and their ears had long since turned in other directions. It was the age, after all, of Canned Heat's relentless boogie and Black Sabbath's blistered blues, and when the Quo's first new single of 1970, the lazy throb of "Down the Dustpipe," proved that the record-buying public wasn't averse to a bit more down-home rocking, their future course was set…