i saw some dude on you tube with the same hanns monnys as me 28" ones, he had them in a triple screen layout on a rig, however half of the stands were still attached to the monitors, it looked daft. when i say half of the stand what i mean is there are two parts to the stand, the neck(your pic) and the oval base plate that you can easily detach.
anyway the guy says the reason he never took the neck of is because hanns said it would void the warranty which makes me think its a back cover off job, i know your bro's is a 22 but maybe the same applies