Thanks for the reassurance, Panda. I needed that because, as I'm sure you know, dropping something and having it disappear into the engine somewhere can generate quite a bit of fear. Luckily, however, I'm pretty sure I dodged a bullet on this one, as I'm pretty confident it can't interfere with any moving parts down there.

Using a shop vac was an interesting idea, but I don't think I could get any attachment into that space, or that there'd be enough suction to pull the switch out even if I could.

But I did order one of those boroscopes/endoscopes on ebay, which RS899, "Admiral of The Third World Fleet" suggested, since I think that may come in handy sooner or later.

Best regards . . .