that was my understanding as well.
And the answers by the CR-5 are slightly different to those by the CRP-5 and you guessed it both will be in the list of available choices.
BA pilots don't need to carry one to my knowledge but it is SOP in some airlines to carry one. I used to carry a small whizz wheel without the wind stuff for doing enroute fuel and fuel uplifts, I very rarely used it. I lost it and as the machine does the enroute fuel and a cheat sheet in the techlog does the fuel converstions I never replaced it.