Yes Frans, I hang my head in shame
I just cant find time to build these days.
Good to see you hear, maybe this thread might inspire me to dig out that kit of parts i cut years ago from my lightest contest balsa
I've done a rough calculation and I think the Mimi has about 14dm^2 of wing area compared to the elf's 11.7dm^2 .. So that's about 20% more area.
So my target of 120g would bring it in on similar wing loading to the Elf. I'm think it could be done with the built up wing and very light wood selection and a small lipo in place of the Nimh battery. But you are right in that the Elf is a fair weather flyer, it cant really cope with anything more than a gentle breeze. Ballast helps the performance in wind but duration does seem to take a hit.