Rolags - How, When and Why make them?

Learning to spin long draw from  rolags is by far the easiest way to start - but the day dawns when
 you have to learn how to make your own which is sometimes a learning curve too far when all you want to do is spin, spin, spin. The topic at the next SpinningSchool is: All About Rolags - How, When and Why do spinners make them? And just to prove my point I will be bringing along a basketful for people to try for themselves....