PEN-F to Micro 4/3 adapter - aperture always open

[tomatic]

Following Andrew's recommendation in his ebook I got an Olympus PEN-F 1.8/38 and this adapter:
http://kiwifotos.com/Pro_show.asp?Proid=166

The problem is that while the adapter fits (very tightly), the aperture lever isn't activated so the aperture always remains fully open even with the adapter attached (unless I press the appropriate button on the lens). With other adapters I have like the Metabones for Contax G and the Kiwi for Canon FD the lenses stop down as expected when I turn the aperture ring. But with the PEN-F and the Kiwi adapter I don't really know how this is supposed to work. There's no apparent part in the adapter that would reasonably be able to push the aperture lever.

What PEN-F to Micro 4/3 adapters are you guys using and do they correctly press the aperture lever?

Thanks!
Tom