Kirk wrote:
Also, this is
an old instrument and I am considering if the money to service it would
be better spent on an upgrade to a L Nav or 302.Has anyone done a
upgrade from M to L Nav.Does anyone know what used prices on the L
Naves are?

Having had both, when an L-NAV is coupled to a GPS, it is significantly
more usable than an M-NAV in final glide. Otherwise, they are pretty
much the same. I sold an early rev L-NAV for $500 a few months back,
used prices range up to $700 for a later rev with temperature probe. A
used 302 will probably cost well over $1500, if you can find one.

BTW, if you don't feel the need for speed to fly, I'd say a GPS, PDA,
and a good electronic vario (Borgelt B40 or 400, Tasman, etc.) will give
you far more bang for the buck than an older glide computer...

Marc