Mine was 4 lb. 4 oz as setup in the video. I could drop 0.5 oz by replacing nose cone w/ a standard hex nut & washer.

I had a Saito 82 on this plane before, and it weighed 4 lb. 6 oz. It does not fly any worse w/ the extra 2 oz. In fact, it flew much better w/ the huge prop wash from a 15" prop: harrier is much more stable, vertical acceleration was much more on-the-punch. The only drawback to Saito 82 on a profile is that it shakes too much for .40 size profile nose, and the fuel tank would shake too much, w/ clunk picking up air.