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For anyone who has undertaken an upgrade from S5 with 155u chassis, 948 processor, tons of ET-100 remote i/o to an S7 (possibly 400 series) with all profibus i/o, would you do it again? Or would you go away from the Siemens line altogether? Chris Corne Melt Shop Electrical Nucor Steel Arkansas (870) 762-2100 ext 239