A key requirement of a fiber optic communication system is its ability to transmit data from one location to another relatively free of errors in the data stream. Compact portability and stability of the apparatus is further aided by the uprights and extensions being slightly inward of each of the opposed sides. The non-creative information is generated by a computer pursuant to a rendering operation performed by the computer. The assembly further includes a stop structure defining a central passage, the stop structure including an external surface having a plurality of keyways defined therein. In either case, the conveyor may be driven using a slave drive associated with an adjacent conveyor.