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			good points hagar:
 SD, I urge you to examine the other side that came off easily.  Is it merely threaded all the way to the base?  Or does it have a little lug that needs to fit into a slot, indicating the need to press ... inward to release, then unscrew.  I recently made the same change and I didn't have the sticky collar problem you're talking about, but the idea of removing the plug first is golden--space is tight enough in there already.  Also bonus points for the glove tip.
 
 Tool of choice in my situation:  Channel-Locks.  Long lever for, well, leverage.  Parallel jaws to grip the ring, and they can be neatly adjusted to the size of your collar and the size of your hand/grip.  Maybe you even need to go an buy a new set to do the job.  Now that would be a double win!
 
				__________________Be Just and Fear Not.
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