When I picked up my kit at JetPower from Peter, I asked him about the wing. This glider, called "Colt V" with electric or turbine motor, also exists in pure slope soaring version, (with a bit slimmer fuselage as there is less to carry inside), and then it is called the OPUS. This Opus exists in different (strength) versions, the strongest one being the OPUS DS (stands for Dynamic Soaring). Do a search on YouTube for Opus DS,... this glider holds a speed record of 420 km/h (!)... (=262 MPH)
Here's just one :
http://nl.youtube.com/watch?v=A64dTHIU-Y4

Peter showed me the wing of such a DS version. Extremely strong. He held one tip at one side and placed the other wing tip on the trunk of his car and invited me to sit on it and even swing up and down. Which I actually really did. Never seen such a strong structure.

The quality of the glider is unbelievable.