A conventional computer is coupled to an analog telephone transmission link by means of an analogdigital conversion interface adapter. The method and apparatus utilizes a shifter to provide an enablement bit for the error reporting. The caddy includes a sheet member which may be made of molded plastic material such as polypropylene, and it has several cups joined to it. Each conducting terminal has a first contact section; a second contact section; and a joining section. By placing the volume restrictor within the compressed gas storage area of the paintball gun, the volume of compressed gas available for a firing operation is reduced, thereby requiring an increased operating pressure to achieve the same paintball velocity.