just use the default settings for the forward warp and twirl clockwise tool. But you can adjust the size of the brushes, depending on your likings.
This tutorial really is awesome, Some people will find it very hard but not because of a defect with the tutorial but because the Style will most likely be something you are not used to. Even if your outcome does not come to be the same as the tutorial shows. Thanks to SP, he has managed to write a lot about other styles and effects within this LP which in return will make sure you learn something new that will most likely improve all your future large art. The idea is simple but you must have creativity within you if you want to complete this. For 60 credits its a bargain, you could create a real piece of art for such a small cost. Buy it to be honest.. Will post outcome soon.