On Tuesday, September 24, 2019 at 10:29:21 AM UTC-4, waremark wrote:
OP, please do report back to us on any further findings.

As mentioned before, CNv uses TE altitude for final glide purposes. The normal circumstance with correct setup and database is that it will show about -200 feet arrival with the glider at rest, on the ground, very close to the selected waypoint. So in the OP's case, with 1000' reserve altitude, it should indicate about -1200.

T8