Its true that the procedural approach course is very intensive and to someone who has always worked in a radar environment,
it must look like one of the dark arts, a pre approach course would be a very good idea.
I have no connection with Rudloe, but I do know the staff who started it all, and what they don't know about procedural approach isn't worth knowing, additionally, they are very focused on getting the student through.
I don't know what your circumstances are, but can you afford to pay for the course itself?
It would be an idea to speak to ASTAC directly, (She who must be obeyed - Pauline Gillet), explain that you're already booked onto the full course, and try and negotiate a price.
I don't think that they'd be prepared to sell you any notes etc, you really need the classroom environment to understand it properly.
Beware of anyone else who tries to sell you materials, there are a few unethical folk who think they know it all and act as consultants, their opinions and materials are worthless, and would probably confuse the hell out of you.
Use the MATS pt 1, learn all the separations and definitions in advance, and perhaps try and spend as much time as possible at a unit which does a lot of procedural approach, they would give you some invaluable pointers.
All the best.
