The other thing that can work is running your fancy primary vario off pitot + static with "electronic" compensation and leave the probe for your mechanical. In this case, the pitot and static need to be *really* good (fin mount triple probe) and not shared with mechanical instruments.

Yes, the LNAV is a flask/flow vario. I do notice what could be some minor transient cross talk between it and the Winter but I'm used to it.

In my previous glider, I had two identical older Cambridge varios (IIRC, something called a Mark II, but pre MNAV) on completely separate pneumatic (and battery) systems: one on a Schuemann TE compensator connected to pitot and fuselage statics and the other on a venturi with a homemade netto capillary connected to forward fuselage statics. After flying around with loops of instrument tubing in my lap one day changing the length of tubing on the Schuemann and the number of hypodermic needle restrictors on the homemade netto, they both read nearly identically during pull ups and pushovers. I had a Cambridge audio for which Raouf Ismail graciously made up a special switch that I could toggle from one vario to the other if I needed. I loved that system!

I confess that I did look at other varios in the past with the objective of getting electronic TE that would provide that 100% independence I had in my previous panel. I have lost primary varios several times over the years and it's an unsettling feeling.

Chip Bearden
ASW 24 "JB"
U.S.A.