Posted for "jon hadlich" <hackmo15@hotmail.com>:

 I have tried a couple locations in Legacys with success. Bascilly, anywhere
in the tail behind the baggage area bulkhead as far away from the pitch servo
as possible. I have attached it to the fuseloge with a 90 degree bracket(
angle could be different depending on where on the fuseloge side you place it)
glued to the side. I put one above the bulkhead access panel, but it was very
hard to get to for service. Just remember it's a compass that sends electronic
signals, and ferrous steel or electric fields will affect it.
 Jon  Hadlich
 Panel installer