Ok.Now we'll start heating the horn.I usually only heat 3" approximately at a time using a chalk line to mark the area.Wave it always and never stay in one spot long.I'm usually about 2 to 3 inches away from the horn.I started using the laser thermometer but after a while using a heat gun you get a feel for exactly how long you should heat it.I get it into the vice within 10 seconds if I can.I heat it a little over 300 degrees that way it gives me time if I bumble.Working with two people is a lot faster and I'm doing this one alone.Which is OK.I've done it before.