Alright this damn rm2 cap is stuck. I have tried everything! I have soaked it in alcohol, let it sit in the freezer, everything short of taking it to a vice and using a pair of pliers.... Anyone got any good ideas?
Try putting some thin cardboard around the base and holding it with multigrips. Heat the cap with boiling water and immediately try to remove it with leather gloved hand, or some similar method. The idea is the heating of the cap (and not the base) will expand the cap slightly and loosen the threads just enough to get it unscrewed.
ETA - you could take it one step further and use a cigarette lighter (or even a gas torch) to heat the cap, but it might discolor the finish on the cap. A very hot heat gun would be ideal.
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