Overall, I think you've demonstrated a fair bit of growth across this challenge. What catches my eye most throughout is the ellipses themselves - earlier on, and through a great deal of this challenge, you do show a few issues worth pointing out. Throughout the cylinders around an arbitrary axis, I noticed that your ellipses tended to be at least somewhat loose. Some looseness is pretty normal (and does continue to diminish with practice), but the reason it stood out was that it was to a point where you weren't generally working with a particularly specific elliptical shape.

It was somewhat hit-and-miss, with some of your ellipses coming out relatively in sync, and others where the successive passes would align significantly differently to one another. It's not a question of what you can or cannot do, just a matter of consistency. 19 for instance was very well done, with relatively tight ellipses, but most were more like 20, 13, 16, etc. where there's much more deviation making it more difficult to pin down the specific ellipse we should be focusing on.

Now, drawing through our ellipses is definitely still important, even though it contributes to this issue. Back in Lesson 1 we establish that we want to draw through our ellipses 2 full times before lifting our pen (2 ideally, no more than 3 times), and you've held to that pretty well. You definitely did end up falling into drawing through your ellipses far too much in your ellipses-in-boxes but overall you are adhering to this requirement, and as such you are drawing your ellipses confidently and keeping them more evenly shaped.

As far as the even shapes go, I did notice that when you started drawing your ellipses-in-planes, you definitely struggled to draw your ellipses within those planes. You often ended up with ellipses that were a little uneven (warping to fit more accurately within the planes), or ellipses that were extremely loose or spilling outside of the plane's enclosure. Needless to say, you struggled with this a great deal.

Now, this story does have a happy ending - after hitting roughly halfway through the cylinders in boxes, you started to hit your stride. Your ellipses tightened up and maintained an even shape more consistently, and their alignment within the given boxes definitely continued to improve. It wasn't all the time - the issues I outlined above were still present, just less frequently.

It's clear that your attention to the extension lines helped as well, and they also helped you to improve on your boxes' original proportions (resulting in more that had pairs of planes that were proportionally square).

All in all, you do still have a good deal of room for growth with your ellipses, and I strongly encourage you to focus on the exercises that include them in your warmups. Remember that you should be applying the three phases of the ghosting method to your ellipses as you would to any mark, and make a point of doing so each and every time in order to tighten up your ellipses and overall improve your control. You are definitely showing growth and improvement and are moving in the right direction, but there is a ways to go.

Fortunately, this challenge marks the last time we force students to freehand their ellipses - lesson 6 onwards allows students to use an ellipse guide, effectively setting aside one common point of difficulty to better focus on the challenges ahead. Getting more comfortable with ellipses is going to be important for your own development, but you've effectively been armed with the exercises to continue improving on that front for yourself.

As such, I'll go ahead and mark this challenge as complete.