I'm not sure if I understand your questions. What has a visa to do with the reg of the aircraft. The visa is for an individual person and I never heard that you could be a citizen of the Isle of Man. Also for the other questions, as long as the documents are available and valid, why should there be any problem? Anyway may be you could answer my question. What will be the benefit to register it with the Isle of Man instead VP-B, VP-C or P4?