Adjust for the 0.25 clips: new picture, new instructions.
NOTE: When doing this, the clips may make “crackling” noises, and there might be discoloration of the plastic on the inside edge. This is actually normal for this kind of 3D-printed part; see our longer explanation farther down on this page.
IMPORTANT: Don’t spread the arms out too far! The more you bend them, and the more often you bend them, the more they will lose their “spring” over time. Yes, they can actually be spread quite large and they will “work” afterwards. But, never as well as before being over-stressed.