Average but cheap 1

Attention announcing "two levels" of what to do is not to be confused with the known spirit level that is unique ... so it's less fun to line ... more if you want to disengage traveling horizontally, the height of column is necessarily at the bottom, and the rotation is not very stable. Before you can use it fully I had to tighten the screw driver 3 legs that were a bit too soft ... supports rather well my 850g reflex but tend to be either too rigid or nodding when I puts the target in the axis of the handle (depending on the setting of the joystick, compromise hard to find).