Don, I would think warming up the frame would be better than cooling it. Warming it would expand it. Maybe it would be worth putting a real big screwdriver in the freezer overnight, warming the frame with a hair dryer for awhile, and then use the cold screwdriver to try to remove the screws. The cold screwdriver should chill the screws well below the frame temperature.
Just my thoughts, good luck.
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Al Eggers (AGE) NRA Life Member
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