Ulf, the plan ribs will work, it just takes a bit more time. Profili 2 is free to download; play around with it before you decide not to pursue it. It makes ribs you can download using your printer at home.

I began sheeting the top of the wing panels yesterday. I'm not sure if it's the best way but it worked.

First, I carefully sanded the leading edge bevels using the guide lines I scribed on the balsa leading edges before the wing was built.

Second, I pinned the wing panel to the plan top side up with the 1/4" stick in place so the wing wouldn't have any twist. At this point I glued from the trailing edge to the main spar and just pinned the sheeting to the leading edge. After that was dry I removed the leading edge pins so I could reach in and take out the pins holding the wing to the board!

Third, I glued everything else including the leading edge. While pushing the sheeting down tight against the leading edge using the building board as a straight-edge, I tack glued the sheeting to the l.e. with ca glue.