The ASK-21 is essentially a perfect training glider. *Its superb handling qualities match its beautiful appearance. *Yes, it's expensive up-front but they have a long life and will pay that investment back.

The only things I would change are convenience items like wing hard points for one-man assembly tools and maybe some hand grips to help lever a creaky old instructor out of the back seat. *I think quick and easy rigging/de-rigging is important for those without a hangar.

Living in the land of mice, black widow spiders, snakes and locusts
and having recently helped vacuum out several large thick piles of
locust body parts from under the seatpan of a K21 I can add another
thing I would change on it. It would be nice if complete access to
the entire fuselage by any critter the size of a baby skunk, raccoon
or possum could be limited. What critter eats the juicy parts of
thousands of grasshoppers and leaves only the legs, wings and other
dry parts? Seems like a mammal would eat the whole bug.