This podcast has a review of my experience using Akerworks drop spindle tool called the Sprindle Crane.  They were a prize sponsor in the Tour de Fleece 2017 on Ravelry, and I had the very good fortune to win this prize! Akerworks website for further information. I promised a few links, here's the easiest to find on Youtube. There is a difference between how the spinner in this video uses the spindle crane, and what I experienced.  I did not get the twist to go past the plastic threader when I worked with it.  I also used a hanging spindle instead of a supported spindle, although I do want to try the support spindle with it next. You have to be signed into Ravelry before clicking this link, but once you are it will take you to the thread in my group for discussion of the spindle crane.