Rolags can be made with hand carders or a blending board. You can card different colours and fibres to make custom yarns or you can just stick with the one fleece . Why use a rolag? In the end it makes it easier for you to spin well. Grace Shalom has some good tips for rolags. Christine, in our group, can make rolags really quickly and efficiently and they always turn out well. Practice! It’s a skill. The more you do it , the better you will get and it is a good way to use hand carders and will encourage you to use them properly. Susan Jewell , in the video, goes through the process very methodically so you can pick it up.