A method of locking of and a directionally adjustable mount including a first plate arranged to stabilize an anisotropic device, a second plate arranged to engage the first plate and provide a support, a second supporting member arranged to engage the second plate and to rollably support the first plate so as to define a local spacing between the plates, and a first supporting member arranged to have a first axis of symmetry and to contact the first plate and engage the second supporting member. In a locked position, the supporting members are arranged coaxially regarding the axis of symmetry, such that a sum of a positioning force applied by the first supporting member and a locking force applied by the second supporting member upon the first plate substantially vanishes, so that a resulting local moment of force oriented to deform the at least one first plate also substantially vanishes.