Two points. First, why does "lo nu ko'a jmive" have to refer to an entire lifespan? Am I not living between 10 AM and 11AM this morning? Is that span not a "nu ko'a jmive"? (It seems you would be happier if there were a "pi so'e" before the "lo nu..." )
Second, oddly enough, it happens to agree with my own (admittedly, non-CLL-standard) interpretation of ZEhA/VEhA+SUMTI, namely that it "ze'i ko'a" means "during a small portion of ko'a"; "ze'a ko'a" "about half the duration of ko'a"; "ze'u ko'a", "during most of ko'a", and "ze'e ko'a", "during all of ko'a". My argument for these are that otherwise ZEhA+SUMTI doesn't make things relative to the sumti, in an analogous manner as PU+SUMTI, FAhA+SUMTI, BAI+SUMTI etc do (and, I would argue, as should VA/ZI+SUMTI). Otherwise what's the point of having four different versions when they would all mean the same length of time/distance?)
(I know the arguments against this interpretation, but just throwing it out there).
--gejyspa