On page 9 in the WNW built-Instructions is a fuel line specified (kit part H28) from the top wing to the Benz motor - it is, however, no tank or filler neck or any recesses of the ribs visible in the upper wing part on the kit.
I think this wing tank was forgotten in the mold.

Does anyone have good original images at hand on which the tank is to be seen?

In the Windsock Datafile 61 are some images included, but they are very dark and blurred.

Servus
Bertl