Yakima StageTwo +Two Installation

yakima.com/products/stagetwo-...
yakima.com/products/stagetwo-...
Two plus two equals more: More bikes, more adventure, and more fun. Adding on the StageTwo +2 lets you double your capacity to four bikes, each carried securely and in style. The stadium seating architecture increases ground clearance on rutted trails or steep driveways and its offset tray design further minimizes bike to bike interference and maximizes functionality. The forward-facing remote tilt lever means fast access to the trunk area and integrated locking cables combine with your own lock to provide serious security.
yakima.com/products/stagetwo
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yakima.com/products/stagetwo-...

[@DayoAdeyanju]

what happens if you accidentally back the screw all the way out. I can't get mine to lock up any more