Hello! Could anybody tell me what is the difference between PA-FE-TX HW 1.0, PA-FE-TX-nISL HW 1.0, PA-FE-TX HW 1.04 and PA-FE-TX HW 1.2 Except handle? Also PA-FE-TX-nISL have only one "big chip". (U16 chip is missing). Does anyone know what that chip does? -- R:Em