Hi, Yes I also guess that the better way now is to make measurements on the model. The Re number does affect, but as the scale is already large, measures will be revelant enough.. Regarding my scale 1, the idea keep the same as in the PAV report. But I complexified it a bit, for example to be able to separate the "wings" or the rear part of the cockpit, in order to be able to manage it at "home garage" size. I'm preparing an internal steel pipe frame, which will be integrated in the foam plates, them selves covered both sides on their faces. Actually the idea of B.Wainfain is seducing, but expensive at my level, when you see the price of honeycomb panel....So, as the strength are kept low, I can handle with simple sandwiched foam. Basically I'll keep 4 modules connected together. In the front cockpit, you'll get the metal frame with engine, landing gear, instrument panel and all command things. As well you'll get the connecting elements (pipes and interfaces) to attach both right and left wing, and the rear block. Thank you for your interest. Any improvement idea is appreciated. Regards.