Hi,
LimeSurvey is thought to be a tool that you may create your survey without being a developer. There is the GUI where you add your questions and your routing just by clicking and entering the texts
But of course you will have to read the manual, especially about Expression Manager/Script
www.limesurvey.org/manual/ExpressionScript_-_Presentation
As you didn't mention the version of LS that you are using, for your information:
Up to version 3.x this was called "Expression Manager", from 4.x. on it it "Expression script"
But as far as I tried it is not possible to enter a value by Expression Manager into the timer duration field. A numeric value is expected.
This is a bit unsatisfying.
But you already know how to do it (copy the questions, different timer duration, different relevance equation).
And it is not "cumbersome" at all.
Copying a question, changing the timer duration, changing the relevance equation doesn't take more than one minute per question.
And to restructure the data? This you do either by a macro in EXCEL or by a few RECODE statements in SPSS. So, no work at all.
Joffm