haha, no problem! I'm glad I could help.
I did a variety of case studies, as I said was possible. I did case studies including Coca Cola Amatil, Billabong, JB Hi-Fi and Qantas, to name a few. I found that by using a wide range of case studies I was more prepared for Section 4, and it also gave me more material to draw on in answering questions, thus impressing the markers and allowing you to access the higher mark ranges. However, in saying that, if you think that you have a case study which adequately addresses a vast majority of the syllabus, you should stick with that but make sure you answer the question asked in depth to show off just how deeply you understand the business' strategies. hope this helps! good luck!