I use this method also, but I learned from the video to trim all the leaves down short. I had never done that but I can see that it would be much easier to see what you are doing. Also I don't use a screwdriver to separate fans but use a tool called a root knife that I got from Lee Valley tools. I insert the knife between fans and separate. Most of the time just twisting the fans will separate them without using the knife. But, then again, some of the large tetraploid clumps can be difficult.
