This sort of thing just kills me - sometimes literally, in a financial sense! I have an application requireing that a large number of analog I/O be read very quickly. The manuals for the processor of chioce weren't crystal clear regarding my max tolerance of 5ms for data updates, given the data load. The local rep couldn't be sure either so we had a conference call with the factory for clarication. After about an hour the factory engineer finally agreed that this processor and card configuration can handle the load at speed. It will do it. So I asked for that in writing. "I have a lot riding on this. If we're wrong, I will get sued. I have to be sure about this and would like confirmation from the factory." Well it says it in the manual, he replied. Yes, said I, but it took three of us - two product specialists - two days to figure out what the manual was saying. Surely you can understand why I want a confirmation specific to this application. All I need is an email stating that I can read each channel in 5ms given some configuration - what you just confirmed here verbally. He wouldn't do it. He thought it was perfectly reasonable that I should be willing to put my reputation and career, and not to mention a lot of money, on the line, and risk getting sued, based on the language in the manual, but he wasn't willing to back up his words in writing - the words he had spoken a minute earlier.