I'am from the UK,I have the red version 110 fitted with MVVS petrol engine and stock muffler.Although Ive fitted the plane out,I havent yet run the engine.All up weight is 13.5lbs.Its a very nice model and seems well made,like all Sig planes Ive had,mainly the 40 version of the 110. TIM...did you use the supplied engine mount?,if so, how is it standing up to the MVVS...looking at the photos it seems as though you did. Thanks..Hugh