John, I agree, the CONTACT point for what I am calling the "action bar" is on the extreme right of it which I think can be seen in the closeup that I showed. The brown plastic part of the switch swivels and pushes the "action bar" down. But for whatever reason it's just a hair short of depressing the plunger. That's why wrapping tape above the plunger has been fixing the issue.
Rob: thanks for the info. These things are frustrating.
so I'm back to my original questions - how do I know what to buy and WHERE the heck could I get them?
As always, thanks - walt