I *thought* there would be good ideas out there, and y'all have not disappointed.  I'm going to try one of the alternatives rather than the basic Lancair-selected part.  It's expensive, hard to mount, and seems to have a weird failure mode.  Why not get something cheaper -- can't lose.

Thanks guys --

Charley

PS -- Anyone want a stock Legacy pressure switch that *might* work properly, sometimes???  ; )