Liam, I will check my maths...
Lets see, its 9 months as a JFO, then year 1,2,3,4 as an F/O... oh yeah you are right, its a minimum of 4 years 9 months in the RHS of a widebody to be a SF/O.
Sorry about that Liam, looks like I made a complete kant of myself by typing before thinking.