On Tuesday, March 30, 2021 at 9:13:01 AM UTC-6, wrote:
Hello fellow first gen Ventus owners. I'm removing and replacing the seals on the lower wing surface of my Ventus b. The previous installation had tape (perhaps teflon) from the wing to the flaps, but no mylar seal. The ailerons currently have both tape and mylar kombi seals. I'm using Streifeneder's drawing to as a guide to install the new seals. What installations are other Ventus a and b owners using on the flap gap? If installing mylar on the flaps are there any problems when deploying full spoiler and the resultant large flap angle pinching or bending the mylar?

I've seen photos online, as well as Schempp-Hirth Ventus C/Nimbus 3 drawings, of a two layer seal with aft and forward facing mylars. The rolling S seal seems like a good idea, but too involved to get done.

Thanks for sharing your setup.
IIRC, Dick Johnson recommended using both the mylar and the internal S seals. That said, I found the mylars in place of the s-seals were fine and improvement. Kestrel 19, not Ventus.