Composite bi-fold doors and other composite closures having improved assemblies are described, wherein the assemblies provide enhanced strength and durability of the doors and their construction while simultaneously maintaining their aesthetics. The apparatus includes a rotor assembly comprising a shaft; a first blade assembly pivotably attached to the shaft at a first initial position; a second blade assembly pivotably attached to the shaft assembly at a second initial position opposite to the first initial position; and a hydraulic movement mechanism. Upon executing a transaction policy override instruction, the default conflict detection policy is overridden for one or more subsequent memory accessing instructions. The sensor elements are preferably arranged in an array corresponding to the array of pin locations in the printhead so that pin detection at each pin location can be performed simultaneously. Accordingly, the flicker or image-sticking can be prevented.