wrote

Bruce;
Go to your local Wal-Mart RV Dept. (IE; trailer / motorhome ) and
find several levels of the type you want. They are used on trailers to
level the trailer for camping. They will be better for your purpose
and much cheaper,probably.
The aircraft T & B has a gyrpscopic mechanism in the rear part-
expensive .

Bob Olds
Charleston,Arkansas



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Also, boat shops. Sailboats use the tub and ball thingies. g
--
Jim in NC