[175K911]

I like Tony's idea but wonder if there isn't a flaw in the logic. Based on his math, which I have no reason to doubt, there's roughly 4-6mm of air space behind the pin. But if the pin truly is so tight it won't come out, trying to drive it further in will run into resistance from the air pressure trapped behind the pin. I'd think it would be similar to hydro-lock. Drilling a very snmall hole all the way through the pin to release the air pressure would alleviate this, but if you're going to drill a vent hole, might as well just drill progressively larger to get an easy-out in there and pull the pin.