Let me guess... It has to be a willow leaf bucktail... It has to be a Buchertail Willowbuck? Anyway I had the same problem... The way I improved this was the following.... I noticed that there was a lot of slack space between the clevis of the blade and the first bead on the shaft. Take a split shot weight and crimp it on the shaft to reduce the amount of slack space between the clevis and the first bead on the shaft. This will help... However, in some instances it still may not spin. It is the proverbial some lures work and others do not... Therefore, when you get one that works and catches fish... It is worth its weight in gold. At the Musky show I even asked the Buchertail rep about the same issue... He really didn't have any advice. I think due to the slack between the clevis and the bead the blade slides down the shaft and there is not enough drag from the water to start the blade spinning.