When I bought this dash, I telephoned Translogic, and they did not know if it could be fitted to a Rocket.
They had a hotline to Triumphs head techie - they called him up and he supplied the necessary information to them, and Translogic passed it on to the workshop who were going to fit it for me - great service.
A couple of fellas' have fitted the Dakota gauges over on this side of the pond, too, ro6ert. Just from the standpoint of factory support, I would think that would be the best way to go. They have a well established track record.