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csx engineer, <br /> <br /> Thanks for the tips. It sounds like I just gotta have the patience to sit down and memorize this stuff until I start dreaming about it. By the way, there are sets of signal indications per rule #, (a), (b), (c), etc. are those variations of the same signal?? Anywho, thanks for your help and I'll break out the pen and start writing. [;)] <br /> <br />Nathan
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