Filament Duck remix for thin large spools

This is another quick and dirty remix of the Filament Duck (http://www.thingiverse.com/thing:143424 by Bold). This one is stretched-and-compressed to fit filament rolls that are too thin and has too large a diameter (roughly 20cm) to fit the original directly.

EDIT: It turns out the thickness of these kinds of rolls differs too. Why am I surprised?

UPDATE: The initial version has now been printed, and it turns out to fit a roll that is 55mm thick quite perfectly. A better fit for 68mm has