I don't own any of these gliders, but after reading Herr Weber's
reasoning, it makes sense. He is not responsible to support those
aircraft. The alternative would be for him to just drop all support.
Would that be better? Maybe it would.

Interesting would be to compare how the old Glasfluegel, Grob, and
other owners cope with the issue of their manufacturers being out of
business. Would it be better if nobody supported the aircraft, so long
as no serious problems arise?