While we're on the topic of IRs, will the off-shore companies (who appear to be the only folks who ALWAYS require an IR) accept a single-engine IR (i.e. one done in Grandpa Jetranger), or do you have to have a twin IR to be treated as 'having an IR'?
I guess what I asking is considering you need a twin IR to fly offshore, would a company be happy to cover your conversion from single IR to twin IR, or is that a big no-no?