Peter,
The wrapping is only glued to the strips at the tips. When the Fokker ribs are made, then the strips are glued to the rib web. This eventually will fix the wrapping to the entire strip. The joint is quite strong as we found in our load test on the cap strips and their attachment to the rib web.
I don´t know how Heinkel did it, but you certainly will not apply glue to where you want to sew and glue the fabric cover to in the end.
Engelmann,
In the meantime you should have been able to download the documents in concern that I have on the D.VIII wing from my server. I have to check and see if there is more that I did not upload so far and will send it to your address via E-mail then. Just give me some time.
As mentioned in my e-amil to you, I would also try the other way of contacting Langdon Badger as suggested.
The bending tool for the wing fittings is in good progress. The first bending arm works quite well. It is amazing how a good tool can easily handle such a material. It bends as soft as butter!
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