Robert,
   I have no knowledge of any of this being tried on an ES.  I recall a few
months ago seeing photos on the LML of a belly strake just ahead of the
rudder that a IV-P builder was adding to his plane.  Since the fuselage is
the same as the ES (though the IV's have a much smaller HS), I suppose it
would have the same effect.  The plane wasn't flying yet, so I don't know
how effective it will prove to be.
   I'm not an aero engineer, so I can't comment with any authority on the
subject.  Short of testing a factory plane equipped with a spin chute, it
would seem to me that the only way to accurately gauge the effectiveness of
any fixes is in a wind tunnel.  In light of the spate of accidents, I think
this might be a wise investment on Lancair's part, even if it's only using
scaled models.  Maybe the production company has already covered this
ground.  One question I have is whether the location of the HS and elevators
on the IV's and ES causes them to be blanked out to some degree by the wing
in a deep stall or spin.
   I learned most of what I know about aerodynamics from my Navy flight
training.  We used a well known manual titled "Aerodynamics for Naval
Aviators", which is published by the Naval Air Systems Command and is widely
available in paperback from the FAA as well as just about any book outlet
you can name.  I highly recommend it for anyone interested in learning more
about what makes their airplanes fly beyond the Bernoullis that crawl over
the wing.  A Google search of the title will give you a long list of places
to get one if you're interested.
   Skip Slater
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-------------------------------------->>Yesterday I had a discussion with
another builder (Martin Heisler) regarding adding a strake below the tail
and >> vortex generators top of the wing and below the HS.  These sounded
like great ideas but we'd like to determine >> if that ground has already
been broken with an ES or other Lancair.  Do you have any background on
these
>> concepts' already being tried?