The idea to mark only one set of measurement points comes directly from our sometimes overly complicated course measurement manual. Of course the manual was written in a way to try to best eliminate error by the novice measurer. The single set of measurement marks tends to force a 1st and 2nd ride comparison calculation. This data is important for both the reviewer of the measurement application and the novice measurer. Too many undocumented field adjustments can make an application for certification nearly impossible to understand.
It is significant for a measurer to demonstrate their understanding of the measurement by showing these various comparisons on the application. Adjusting the course after the two rides are completed, and after a re-calibration, is very sensible. The single set of course marks is the benchmark all other factors rely on.
Granted, a more senior measurer can certainly use any method they have grown accustomed to. Sometimes I ride and mark a longer end point on a second ride. The novice measurer should really go thru the complete suggested course measurement exercise.
Editing the course measurement manual is a very good idea. There is more than enough data and testimony speaking to the manual’s clarity and understand, or lack of. A new edition would seek to streamline and un-complicate tricky topics and application forms. New edition readers/users would benefit while old edition readers/users would lumber along as we have for so many years. Most would likely welcome a clearer and more concise manual and toss the old one in a hurry.