On Sunday, December 16, 2012 6:37:31 PM UTC, son_of_flubber wrote:
I'm looking for a Digital Average Display (DAD) for a Borgelt B40 Vario. New or used. Only 300 hours on the instrument.

Ermm ... why?

You can fit a simple two-way switch to go between average and instantaneous display on the needle (see manual, but it's a 5 minute job). I use my B40 on average pretty much all the time, using the audio for instantaneous readings. Works really well, and if that needle is even a hair above 0 then you're climbing.