I'm in the finishing stages of my 4*120. It will be powered by an OS 160. I made many modifications to the kit. I totally rebuilt the wing to make it stiffer by sheeting the leading edge and adding cap strips. The wings were also clipped by one bay on each end and rounded wing tips were added. The tail feathers were stream-lined by rounding the squared off corners and all control surfaces were tapered. I also cowled in the nose to the shape of a 3" spinner along with adding wheel pants. Overall weight, 11 lbs. Just hope she flies as good as she looks. I Plan to find out in about a week..........RS