In another thread, I was told that an in depth knowledge of PPL theory would make ATPL alot easier to comprehend where the subjects cross over. Am I to presume this is the case, and using BGS would bring the most relevant ATPL theory to the fore. Or, if a thorough job was done at PPL, would the OAA syllabus make more sense.
Is it worth doing the ATPL theory at PPL level, and breeze the PPL questions, or would it be way too complicated to grasp for a beginner?