Originally Posted by The Saint
The flex and stretchability of the rubber bracing is what allows the scope to be zeroed through the use of adjustment screws located on the right side and top of the scope handle.
Hi, I'm sorry that is incorrect. When the rubber bracing is removed, you'll see a single spring mounted on an angle. This spring exerts itself onto the monocular. It is intended to push the scope diagonally upwards.
I've updated my review and included diagrams of the scope's internals and modifications that can be done.