I'm interested to buy a NN5 with a R-D16 rotator, and I want to know if it's possible to mount the NN5 on a ballhead without the R-D16 (to save weight during a long trek ; I will use the rotator otherwise).
I've seen that the two anti-twist pins on the lower rail can be removed, and that the center hole used to fix the NN5 on the rotator (between the two pins) is threaded. What is the thread size of this hole ? Is it a standard 1/4'' or 3/8''? In this case, I think it will be easy to mount the lower rail on a tripod or ballhead screw.

Stephane