@ Qlad —
I was over with you in REG last month. I hope the REG exam went well for you.
To answer your question as to whether reading the material in BEC regarding SOX 3-4 times if it is enough — in my experience it should be. I have taken this exam but it was over 18 months ago and it did not go into great detail. But you never know, you could get those 1 or 2 questions that dive in a little deeper.
Are you reading the material and then doing the MCQ for each section? The reason I ask is because I am listening to all of the lectures first and I have not completed any of the questions yet. The MCQ can give you a good idea of how deep the exam will go into the SOX information.
I am currently on BEC 3 of listening to the lectures and WOW! I forgot how formula intensive chapters 2 and 3 were. I am listening to the lectures and stopping to write out flash cards with the formulas and it is slow going. It will all be worth it in the end.
Good luck on your studies.