Given that the aircraft performing a perfect tailslide would have a pure vertical entry, slide backward perceptibly, and flop in the correct direction I would assert the following: Unlike any other maneuver in the aresti it seems that the closer you are to scoring a 10 in the tailslide the closer you are to getting a zero. Obviously it makes the maneuver very unforgiving and will bring more CHANCE into the mix of a closely contested event.