Before I learned to use my Towa gauge (I bought used and it came with it--but no instructions) I tried the Jamie Wallen drop method but struggled. Then learned to use the Towa and now use it every bobbin I use--180-200 is what I use every thread on my Gammill. It amazes me that I can wind 2 bobbin same thread and they can vary. such a time saver on the long arm.