Oh, THAT'S a relief. You had me going for a moment there

Sorry, I'm not really up on all the early Euro gliders so I don't know that one. But if you go back and look around at all the gliders that were popular at the time it's not much of an accident that the early Dassel and the GL should look much the same. Carl may even have seen one and gotten inspired by it. But it would also be just as likely that he put his free flight background to good use in designing the GL out of his own head exclusively. There's nothing new in the GL model if you look at some of the free flight models that preceeded it and the thinking that Carl described in his magazine article. Your Dassel may have been designed using much the same background and information and hence the similarity.

I like your thinking about keeping the planform and just updating the wing section and construction methods. Either as the original 2 meter or scaled up a little to 100 would make a great model.