Sage actually has an Audio option now, though I've only flown with the mechanical version which is very fast to respond. I believe you can even upgrade an older model to get audio.

The L-Nav has a pretty significant lag that takes some human compensation to optimize for. Especially in a big glider like a Duo.

I'm curious about the rave reviews of the Clearnav vario that also talk about "when it's finished" or other statements along those lines. Is it that it just lacks a feature set to compete with the V7 or Butterfly varios?

The Rico vario is up there for novelty. As a fisherman, the clicking sounds like a fish taking the bait softly.

Morgan