RE: BRIO ENGINE OFFSET
I don't have numbers and believe it would be difficult to measure, unless its with respect to the wing incidence. I recoommend using the spinner ring as a reference mark. The plane needs slightly less right thrust from the spinner ring if you run 2 or 3 blade props, and its pretty close for 4 blade props. Plane needs just a little bit (1/16 inch down thrust) with respect to the spinner ring. Again, no measure and I may have tried to measure at one point but again but found it to be inaccurate with respect to the fuselage (there are no straight lines on the fuselage to measure from. Best of luck and the plane flies great in this configuration.