Yes, spinner too tight is probably the problem - it happened to me too. My solution to loosen up the spinner was to remove the spinner wheel and remove the c-clip, which will revealed a wavy spring washer that supplies pressure to keep the spinner from spinning too much. I flattened the spring washer slightly to reduce the pressure on the spinner. After that, the spinner spins more freely and the lines became small enough to be a non-issue. I still feel like the finish could be a touch better, but its as good as any of the local guys ever did and I don't think I'll do much better until they come out with finer wheels for the X series. Thanks. I spoke with Blackstone. They said to push the spring washer down with my thumb for a minute and it should help. So, I took some pliers and held it down for 2 minutes. The spinner actually spun this time. You are right the finish could be a bit better but I will settle.