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We are upgrading our hardare from our ac460's into the 800m Controllers, and will be looking at converting our database and configuration into the 800m using, most likely, the mod extention library. we are still unsure if we will be using function designer or control builder at this time, but i'm leaning towards control builder. please send me you email address to discuss this further if you have or know someone that has hands on experience with this conversion.