I agree with SBFs comment that the major and most lasting effect of the Aid book research was the elder arrangement and governing body.
The Insight Volumes are undoubtedly simply a rework of the Aid Book. Many parts of Insight are taken word for word from the Aid Book. What they did was take the Aid book, put in some pictures, enlarge the text, and change the wording only in the places where the text didn't support WT doctrine. there may have been some entirely new content, but not much.