I just spoke with a builder at our field who was a rep for dynon and has installed several dynon systems personally. He looked at my SS7 and said the best likely place is securely suspended from the triangular steel plate on top of the fuselage behind the baggage compartment. I'm thinking of using threaded aluminum spacers attached to the plate, and a small platform below to mount the ADAHRS. Ill position it securely after I've hooked up the entire system. My FWF and engine arrives tomorrow and I can begin working on it.