Guzzini art 4000 light - shade mounting  

last month i post some pictures of a Guzzini Art 4000 light i totally restored after being rescued from a long spell on a garage shelf (see link)
Now i'm wondering if i mounted the shade in the right position after seeing a photo of another, should the 4 mounting points be in line with the 4 creases in the shade?, or have i mounted it correctly? (as in my photos)
if anyone could post a Guzzini catalogue image that would be excellent.
Ive been looking on the Guzzini archive site without any luck, even though "Gae Aulenti" is often credited as being the designer of this light Guzzini credit only 1 of their designs to him the "castello" celing light.

thanks for any help.

http://picasaweb.google.co.uk/aandrew.07711334925/GuzziniArt4000?feat=directlink