http://www.fly-koessen.at/spt/index_en.html

The members of the PMA provide their products free of costs to
pilots for test flying. Instead of having several individual, time and money
consuming test camps spread all over the world, all manufacturers offer their
products at the beginning of the European flying season central in Europe in
Kössen with its ideal infrastructure. For pilots keen to test several brands and
to compare on site, this creates cheaper and timesaving possibilities to do so.