You should invest in a new tank, or a good accident insurance policy. There's a reason there are certified "pressure vessel" welders. Patching on an air compressor tank ranks right up there with sewing up rips in a parachute.

"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!