Ordered and received. It didn't dawn on me, but when you extend the legs 12" you don't get a 12" change in height, but less (a cosine-thing). This extension is all 12". It may be just right all by itself. Nice. After the extension came in I ordered the "ear posts" from Losmandy to mount on it for the drive system control box to mount to. I wanted to leave the ones on the tripod itself in case I don't always use the extension. Also ordered another set of the fancy tripod knobs.