Tile/fiber results for the upgraded plug hadron calorimeter

We summarize the R&D results for the Upgraded Plug Hadron Calorimeter using Tile/Fiber technology. The transverse uniformity of the response of the tiles as a function of fiber groove depth and the position of the fiber within the groove is discussed. We compare the light yield and transverse uniformity of the response of megatiles vs individual tiles. We also present the results of a study of the light yield of tiles as a function of their size.