What kind of weight did you end up with this combo. I too would like to buy this plane and put my OS 120 in it but the Manufacturer list weight at 12 - 14 lbs. I was reluctant to go with the 120, now you say a 100 has more than enough power ??? I took my Saito 100 out of an 11 lb. GP Spacewalker for lack of power, I can't believe it would be enough for the Mono Coupe, and we're not talking about any real fancy flying either, just everyday aerobatics !!