Ton too heavy for lightweights.   Morton all but ended any faint hope Inverness had of making the play-offs with a clinical two goal victory in the Highlands, their first ever at Inverness. A sorry Caley Jags look destined for another season in the doldrums after failing to win this six-pointer and Morton took full advantage to move above Dundee United into third place in the Championship with their fourth win in the last five games. A first half goal from Scott Tiffoney was added