Torque shafts and other related systems and methods are described herein. Forward keys and backward keys are generated at the server. A loading of the state of the access request signals happens, if an access request is present while a read or write cycle of the memory is executed, upon the arrival of a pulse on a signal issued by a memory controller associated with the memory and indicative of the end of a memory cycle. The invention allows engineers to experiment with system architecture, user interface, and software development while product-specific hardware and mechanical assemblies are being produced. Further, authorization decisions are partially distributed, easing the resource burden on a protection server. The sub-base may be removably attached to the base on the side from which the blade projects.