All the books that I have ever read on the delights of the whizz wheel have always used the wind down method. So apart from anything else you'll get confused if you try and work through an explination.
I would also suggest that the exam questions are written using the wind down method. Sometimes the answers are a bit tight and its amazing how much time you can waste double checking an answer. So do yourself a favour and give yourself the best chance by using the same method yourself.
My last pointer is bin the pencil and get a good quality water based marker pen with a very fine tip. Makes your mark very clear to read and speeds up the process.
Good luck with the exams !
