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More progress. My thanks to Pete Ward at the Falcon Model Flying Group for providing me with the new motor. It is now fitted to the fuselage but some cowl modifications were needed to get it to fit. Whilst the crank case width and engine bolt holes were identical to the previously fitted OS91FS, the cylinder is appreciably larger and the motor length is about 10mm longer. A spinner will cover that mismatch. It has all fitted together nicely as you can see from images. The standard exhaust sits comfortably in the lower part of the cowl and a silicon exhaust deflector tube will be able to p