The other H9 Extra 260 thread is getting too focused on carbon gear issues so thought I would ask this question here.

In that thread, many of the DA 50 installers rave about performance, which it should have for plus $600 for the engine, but most who indicate, their dry weight is approximately 15 pounds. My question is where is the weight coming from?

Last night I weighed all the components (box contents, radio, spinner, Duralites, etc.) for my H9 Extra and according to the totals, less engine, is 7.81 lbs. The box contents weighs 95.5 oz., Radio components weigh 24.5 oz, spinner/adapter weighs 5.0 oz.That leaves me 7.19 lbs for an engine, prop and ignition system (I thought the DA 50 was THE lightweight to have!) and miscellaneous.

What am I missing here? Did I get an exceptionally light airframe or did they get an exceptionally heavy one? Or does phantom weight creep in when it is assembled?