I've used this without any issues whatsoever for the past 6 or so years.
As the pictures show, Ross Judd was the prior owner. This piece of kit has been around and it is absolutely rock-solid. Mount it to speed rail, a Mitchell Mount, or some other manner the grips come up with This Mitchell mount has an array of tapped holes where you can put a key-way.
I'm on the westside of L.A.. Prefer local deal. Paypal add 3%.
I'll be at The Camera Division tomorrow morning; if you're in the area and want to check it out swing by.