>This is for my little bot -[one day soon]. I can see it now. >Bot drives down the stairs [underside feelers go momentarily >non-responsive], SLA ruptures, coating bot in sulfuric goo. Worse still you get into Trouble and Strife with the Trouble and Strife for the acid burn on the carpet :) For those not in the know, "Trouble and Strife" is cockney rhyming slang for "wife" -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics