Uh, no. Not for $400. That's just insane considering you won't want to use it. I handhold everything I possibly can and I love it that way, it's much more enjoyable to hand hold imo.
It is a bit nuts. I agree. Paying for some add-ons that are worth 4x more than the monopod itself. Even if it does give me access to the y-axis. Probably why I haven't already taken the plunge. That and I haven't used my monopod once since I bought it. I too prefer to handhold. But at the same time I do see the value in using a monopod. That's my dilemma.
There will be instances later I'm sure where a monopod would come in handy. Any time you no longer need to support the camera's weight leaves your hands free to do other things. And pretty much eliminates camera shake.
I suppose for now I'll hold off and see how things go without purchasing the RRS monopod head kit.
I will be buying the big 70-200 f/2.8 Nikkor and that lens weighs in at roughly 3 pounds. Should be able to handhold that with my D300 for a little while. Failing that I should be able to find support using the environment. Propping myself against something inanimate. There's usually a way to get around it.
Besides, I was watching a Nikon video featuring a Sports Illustrated American photographer. He was handholding his D3 with what I think was a 600 mm lens! And when not handholding that beast he had the lens on his monopod w/o any monopod head. Just the lens bracket screwed into the monopod. That's it. Even a seasoned pro. None of the other guys he was talking to in this video clip (also pros I'm sure) had monopod heads either.
So who buys these RRS monopod heads? If not amateurs like me nor pros?