Understanding Society User Support

Hello,

I'd have (another) question on longitudinal weight selection.
I've conducted a latent class analysis in wave 4 and I'm using the latent class membership as an explanatory variable in subsequent analyses. However, another important explanatory variable I've derived is the length of unemployment respondents had been exposed to prior to wave 4. This I've derived from the employment status history modules and the annual event history modules. The employment status history module was asked to some households in wave 1 and to others in wave 5. For those that were asked in wave 5, I've 'backdated' their employment spells. My question concerns the correct weight to use. Originally I was planning on fitting regressions on the outcome in wave 5 in which case I would have used the correct wave 5 longitudinal weight. However, now I'm considering looking at an outcome which is only available in wave 4. However, because of the unemployment variable, would it be methodologically sound to still apply the wave 5 longitudinal weight (given that some of the information on prior unemployment has been derived from wave 5?) even when I'm looking at an outcome at wave 4?
Thanks very much for the help.

Best wishes
Rebeka