My son and I just finished one (ours is called an Irin, but its the same plane) It came out at 4 lbs 1 oz with an OS 46 fx. We flew it for the first itme this weekend and I am initially impressed. We still have some trimming to do, but I think it is a good first pattern plane. The rudder authority is very good, and knife edge flight was pretty stable. It also slows down nicely when you back off the throttle, which I did not expect. We are using it as a pattern trainer for my son.