It hasn't been said and I am sure it is obvious to everyone...but out of an abundance of caution I am going to say it anyway...remove metal only from the stock iron, don't mess with the lug on the gun.
I use a riffler file to remove metal on the bottom of the channel in the stock iron. The curve and narrow profile of the riffler works great and it is a lot easier to control than a dremel tool.
Ron
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If it's made after 1918...it's a reproduction
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