You 2S guys please adjust my thinking if I am wrong. The 2S is not any different than the 2, just Stretched. Certainly not the airfoil.
+++++++++++++++++ That is what I thought and you are mostly correct Dan, but I gather from Mark L that the wing plan form is also subtly different. (Tip section) The Ashok section were never provided or even accepted by RR coz that precludes the builder buying the pre-fabricated wing skins. Take care SteveJ I guess we should here a big yee haa from other Mark anytime soon??