The present invention relates to systems and methods for forming images in solid surfaces, and to solid surfaces containing an image. The system and methodology employ generalized \u201cidempotent\u201d request that have the property they only execute a request once, and always return the result of that first execution should the request be repeated so as to ensure exactly once execution. The L-shaped attachment is connected to the trim blade spindle of a riding mower, and comprises a pulley surface and a downwardly extending trim shaft holding surface. The polyimide production apparatus enables the production of a polyimide film which has a volatile content of 0. The gas feed introduces a processing gas for striking the cleaning plasma at a location in the processing chamber that is between an axis of the substrate and the top edge electrode.