Join the club. Fortunately, mine only acts up when the A/C is on
(temp sensitive problem?) and even then, it works OK most of
the time, so I've ignored it so far.

Can someone tell me where the regulator is located? I spotted
the blower motor below the dust filter (passenger side, engine
compartment). It looks like you need arms as long as a gorilla
to reach the blower motor from the top of the engine
compartment, unless I'm missing something.