Quick plug for Really Right Stuff
I purchased my second item from them and received it today- the MH-01 monopod head. If you're considering a tilt head, check it out. I mounted my 500mm to it and was VERY impressed with it. The tension required to lock the lens in place is minimal, and when this is done, it does not yield at all! It's conservatively rated at 75 lbs, which I don't doubt after actually handling it.
It's an incredible piece of gear from RRS, which isn't unusual. But what is unusual, is that it's reasonably priced at $150. IMO
I will be using it in tandem with my RRS B2 Pro L QR clamp.
Just a heads up,
Colin