better to do it after first reading of fa. so when u will do q banks you will know wat extra material is given in u world which is not in fa and u will be able to add to it in ur book. also doing DIT and FA before qbanks will def improve ur performance and understanding of questions.Is it better to use DIT after reading First Aid or should I wait till I complete all Qbanks[Kaplan&UW] ??