That is a very useful blog post, thanks for creating and sharing it!
Some comments on the approach: This is a very interesting, though time consuming work-flow. One could speed things up with some PHP coding so that a user automatically gets redirected to a new PHP script at the end of the first survey (there is an "auto-load end URL" setting at the Limesurvey survey settings). That script gets passed the survey ID and data set ID and then reads out the data of the current user and populates the token table at a follow up survey automatically.
This avoids all the manual work and Excel magic you otherwise have to take care of.
Some comments on the approach: This is a very interesting, though time consuming work-flow. One could speed things up with some PHP coding so that a user automatically gets redirected to a new PHP script at the end of the first survey (there is an "auto-load end URL" setting at the Limesurvey survey settings). That script gets passed the survey ID and data set ID and then reads out the data of the current user and populates the token table at a follow up survey automatically.
This avoids all the manual work and Excel magic you otherwise have to take care of.