Thank you.
I am sure that aviation examiners know that there are slight variations in aviation physical constants throughout the world, and aviation being an international issue would take this into consideration. I am also sure that the examiners are aware that different types of aviation computers are available, and take this into consideration in their answers, when it comes to a written paper. On a multiple choice question/answer the correct answer can be derived from rounding numbers. What I was looking for is if there is a difference in the physical quantities calculated by the E6-B, and CRP-5, that would retard my answer, and choose the best accordingly. If they both calculate the same things, I will get an E6-B.
Andrew.