OK so I've run into an issue with this...
At the moment I'm trying to add each set of questions (a set per item type), into question groups of their own. So I set a relevance equation on each one of those groups to have that particular group displayed next when the relevant dropdown option as been selected in the previous question.
However, there's a problem, if the user wants to add more than one of the same item type, then this wouldn't work as I'm guessing it would just load up the list of questions that have already been answered.
As well as this, there's no way of logging what items have been selected and what questions have been answered for that item, mid-survey.
I'm beginning to think that LimeSurvey was not the most ideal solution

Any help please? Thank you in advance!