On Thursday, October 23, 2014 12:15:57 AM UTC-7, krasw wrote:
Sorry for on-topic intervention, but is the variometer technology (hardware) identical in V7, V9 and S80? Or in other words, is there any evidence to think it is not identical?

Hardware is similar but the V9 S80 has inertial sensors.
Chart explains

http://www.lxnav.com/products/lxnav-varios.html

Richard
www.craggyaero.com