A handling door for an industrial building includes a flexible curtain or apron having a plurality of sheaths. The first and second mediums having different indices of refraction to facilitate reflection of the output light from the light source off a reflective surface of the integrating tunnel and propagating the reflected light substantially towards an output end of the integrating tunnel. After forming of the flechette in the die is complete, the final flechette can be severed from the bandolier, or the flechette can remain intact with the bandolier for post-forming operations, such as coatingfinishing. If it is determined that the information processor is not executing a job, then the received configuration information is recorded and the configuration information is updated.