In rec.aviation.piloting Dudley Henriques wrote:

On long cross countries in some of the WW2 prop fighters we handled on
occasion, I would set up and trim out carefully then relax in the seat
as comfortably as I could and fly the trim wheels. With a bit of
practice it became possible to hold the altimeter needle to within a few
feet of desired :-)

On long cross countries in rattle trap old Cessna 150s, I would set my trim
the best I could and then shift my flight bag slightly fore and aft until
the altimeter vaguely settled down. If it was really bad, I'd move my seat
forward or backward a notch. This seemed a lot more precise than moving the
trim wheel.

--
Frank Stutzman
Bonanza N494B "Hula Girl"
Boise, ID