A tool support structure with an adjustable work support assembly comprises a base and a horizontal support provided on the top of the base. Each ring airfoil projectile is coupled to a sabot, the ring airfoil projectile and sabot mounted to a housing in a cartridge form. The instructions also cause the processor to generate a signal representative of at least one expression of the viewer made at or around the time the content was presented based on the image of the viewer, and also to receive metadata identifying the content. 2 to 10 mgm2 and mass per unit area of Al is 0.