Well Wouter, I was asking about the profile, and as those spars dosent’t have the same profile it is not so straight forward to compare the wall thickness. You of all should know that it makes a difference just if one puts the carbon on the inside or the outside on a 4 mm thick wall of a wooden spar with the same profile. Let’s keep this kind of discussion on the F16 forum in the future, it seems to belong there. That was my reason not to shift it over there, even if somebody did the mistake to do it.