I don't use hammerheads. I tried to do em off-line (not that easy either) but what would be the point? Trying to rope someone is too risky anyway and doing a hammerhead is too predictable for higher cons.
Fly the G-10 a lot these days and it's damn hard to hit someone with that plane. But I love to see a Spit or Niki go vertical and go BAM-BAM-BAM from super close range when their airspeed is near zero and even they cannot evade quickly enough.
Many years ago I read an AW DOS manual, one of the rules given there was 'speed is life'. Indeed. Hanging on your prop makes you an easy target. Nice if you can pull it off and blast the sucker that stalled out before you did but not my style.