On the subject of soldering, the amount of heat required to silver solder that much of a surface would compromise the rib joints and the finish on the barrels. If soldering is an option at all, a low temp solder would be used.

Never throw a gun in the garbage... Sell it for parts.

Midway USA has a video on YouTube of Larry Porterfield doing exactly what you are wanting to do.

Thanks guys
I got the shim idea from the u tube tape, Larry doesn't say how long his stayed on though.
He has two tapes one shows gluing the shim and the other shows Tig welding the lug. If I had a tig welder I would have already done it but those are a little pricey.
Seems like the lazer weld idea is a real good route but I must try everything within my ability first.
Tom

TIG welders
 

TIG welders are now in the $250 range on Ebay now, including shipping. You'd still need a gas tank and probably a regulator, so the final set up cost should be less than $350. I'm eventually going to go that route..
Ken