Overall you've done reasonably well here, and I'm pleased to see that you've been quite fastidious in checking your minor axis alignments. You've done a good job of avoiding the temptation to mark those that are quite close as fully correct - this can lead to plateauing when we get into that realm of being consistently "good enough", so continuing to pay close attention can help avoid stalling in that manner.

When it comes to your linework, don't forget to apply the ghosting method in its entirety. I'm noticing that your side edges tend not to show signs of its use, including the absence of the start/end points from the planning phase, and hesitation in the execution causing slight wavering at times. While your overall execution is still pretty good, it seems that you may have set aside the ghosting method much too soon - it is required to use it throughout this course whenever freehanding your linework. I also noticed similar lapses in some of your ellipses, where you either didn't draw through them enough, or drew through them too much - generally try and stick to two full turns of the ellipse before lifting your pen.

Continuing onto your cylinders in boxes, there is an issue here that has unfortunately somewhat undermined how effectively you were able to use the exercise. It comes down to the fact that you appear to have purposely tried to force your vanishing points to infinity on all axes, resulting in every set of edges being parallel not only in 3D space, but on the page itself. As noted here in the box challenge notes and as reiterated here in the 250 cylinder challenge notes, this is incorrect. It also undermines the way in which this exercise is meant to work.

This exercise is really all about helping develop students' understanding of how to construct boxes which feature two opposite faces which are proportionally square, regardless of how the form is oriented in space. We do this not by memorizing every possible configuration, but rather by continuing to develop your subconscious understanding of space through repetition, and through analysis (by way of the line extensions).

Where the box challenge's line extensions helped to develop a stronger sense of how to achieve more consistent convergences in our lines, here we add three more lines for each ellipse: the minor axis, and the two contact point lines. In checking how far off these are from converging towards the box's own vanishing points, we can see how far off we were from having the ellipse represent a circle in 3D space, and in turn how far off we were from having the plane that encloses it from representing a square.

Without the convergences, the line extensions become considerably less useful. I will as such need to assign revisions to this, though rather than assigning the full 100, we'll cut it down to 40. This is because I see some more convergences towards the end of the set, although not enough to fully demonstrate your understanding of the issue.