The trick is "quick" and HOT! Don't mess around- - - -get the sleeve hot and tap the cutter bar on the torch. It will blow a slot in the sleeve a shade faster than instantly!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!