Two things to keep in mind, then:

• What you described about doing extra cylinders is grinding, which goes against the spirit and instructions of the course. I'd recommend reviewing the material (mainly the video) on this page of Lesson 0, as it explains that you should only be completing the assigned quantity of work. This newer overview video for the box challenge which was released last month also discusses grinding and further defines what we consider to be grinding, and what we don't.

• Insofar as having trouble drawing through your ellipses, it's perfectly okay to struggle with something as long as you continue to make the effort to do it - as that's the only way such things become easier. It's fairly easy to slip into the mindset that we'll avoid doing something because it's difficult, but ultimately everything we seek to learn starts out that way. If you find yourself undershooting, try to draw through a little further to counterbalance it (which hopefully your brain will continue to overshoot, accomplishing something closer to two full turns). Then later, if you find yourself overshooting too much, do the opposite - this is similar to the solution to arcing lines that's explained in the ghosted lines exercise page. That is, where we intentionally try to draw a line arcing in the opposite direction. Over time this rewires the brain's understanding of the relationship between the intent, the action performed, and the result achieved.