I have a Pentax K-x with the 10-17mm Pentax Fisheye. I want a portable and not too expensive panohead, and the NN3 seems ideal.

Can anyone confirm that this combo works, including shooting the zenith straight up without re-attaching the camera?

I'm finding inconclusive posts on the web, here is someone with a K-10 having problems:
I could not find any proper size comparison k-10 vs. k-x, so i figured I ask for experiences. The german reseller doesn't have the nn3 in stock right now, so I'm considering ordering from the us - this means returns would be expensive shipping wise.

Bonus question: If I get the nadir adapter, does it give me more/enough clearance for the vertical shot?