Half hour was not near enough for me, but I was locked in to a dead time spot and suddenly got it. I still half hitch (with a ball-pen body) often, but when I do a bunch, I like the finished heads from the whip finisher better.
There are several old timers in the club that do a great whip finish in their fingers, but I haven't gotten that far.
Cheers from Gray's (for now) California,
Ross