Just a thought but if I wanted to be really really light I would get the Yak...lol. You can easily spend a lot to save weight on a plane. There comes a point when you realize its not worth it. With this thing around 16lbs with a DA 50 I think it is plenty light. I think the farthest I would go would be a wing tube not so much for the light factor but for strength. Kavan's are another cool way to save weight but they sure do get eaten up fast if you fly on a paved runway.

Again I think at an honest 16lbs with no mods this thing is going to be amazing. The newer designs rival that of some of the most trick custom built kits. Lotsa lightening holes and yet re-enforcement where you need it.