Here's another little "welding" tip....
When doing something with "endings" -- start a tack 1/4" or less from the end and run it to the end -- back off the heat as you come up to the end and double dip @ the end just before lifting completely.... hold your torch for the post gas period..
Always weld up your corners or ends first. Place a couple quick tacks along the run so your metal doesn't gap out ahead of you. And tap your work down to close up any gaps created by the tacks.
Now go back and start your run. Go right thru the tiny tacks you made like they're not even there.
Any time you're finishing - dab twice or you get a crater or pin hole and don't just let off the gas pedal sharply. Anticipate the end of the run or the end of the piece and start to back off the heat - as the heat is already built up and has no where to go - which is why you should close up your corners or ends first... so you don't get down there with all this heat and just blow it up.
