I guess with the E6-B, CRP-5, and a navigation plotter most if not all Flight planning, and navigation general aviation tasks can be done, which in an airline scenario is done by professional flight planning software, addition of the CRs would probably complicate tasks to be done by a GA pilot. I have finally decided to settle for one of the FAA approved electronic E6-Bs, and a UK CRP-5, together with some sort of professional flight planning software, with an international database.
Thank you.
Andrew.