Yes this technique is possible just be sure to be careful with the amount of heat you apply, it may take some practice. I first read about doing something like this in another persons post where he described doing it with a bubbler. I tried that technique and it actually worked pretty well for me so I think you could get it to work
The Edge... there is no honest way to explain it because the only people who really know where it is are the ones who have gone over. The others--the living--are those who pushed their control as far as they felt they could handle it, and then pulled back, or slowed down, or did whatever they had to when it came time to choose between now and later - HST