At the bottom of the new Ventus page in the Questions and answers section it says:


Is it possible in the future to fly the Ventus´ with 15m wing span?

The wing design of the new Ventus´ was optimized from the beginning for 15 meter and 18 meter. There will be a retrofit kit, but not for the second half of 2017.

http://www.schempp-hirth.com/en/sailplanes/the-new-ventus.html


Rumour has it that the design has recently been completed for the 15m tips and the late 2017 date mentioned above should be realistic.