Great idea, not entirely perfect end result. Great idea to use aluminium tubing, nicely anodised almost look like carbon fibre made. This makes the whole construction ligh, and the end counterweight feels realy heavy because of the light front end. The flat part on the upper tube makes it not possible to rotate which is great. Now the tilting mechanism works perfect verticaly, but not horizontaly. Horizontaly it's not possible to clamp it so tight that it can stop the arm from rotating. In a tight seting if you push the arm even with a light touch it will rotate left or right. The other downside is that the USA made products still use 5/8 threads. Guys, please evolve to 3/8 thread!