Matt,

Good luck in your project. You will need to be very careful during construction. Please keep us informed. I built the Abbra in all versions and found that the weight penalty of gas engines is a little over 1 lb compared with glow Abbra version. The Abbra was design originally for gas engines so the airframe is very light. Using the OS 160 is below 10 lb. It is good that you are going to use a soft mount. The first version of the Abbra did not have one and was almost destroy by flutter (one aileron). We used a custom built Hyde mount and solved the vibration problems.

Vicente "Vince" Bortone