Starting with your cylinders around arbitrary minor axes, there are a few issues I want to call out to ensure that you're approaching your linework correctly and that you're correctly understanding how to approach these cylinders, but overall you're doing decently. You've varied your rates of foreshortening over the set as requested in the assignment section, and you're fairly fastidious when checking your minor axis alignments, to ensure that you don't end up plateauing your growth in that area.

In terms of the line work, there are a couple things I want to call out:

• Be sure to use the ghosting method for every mark you freehand, as noted in Lesson 1. So that would be for your side edges (be sure to apply all of its steps, including the planning phase, which for straight lines it's very beneficial to draw the start and end points so we understand what we need from the mark we're executing). We can of course apply the ghosting method to ellipses as well, though it's more about focusing on investing our time correctly, focusing it on the planning and preparation phases, and then executing our marks with confidence from the shoulder.

• Be sure to draw through your ellipses two full times - you're definitely trying to, but you may not have noticed that you often stop short of two full turns of the elliptical shape. This suggests that you could be a bit more mindful of what you're actually doing.

• Be weary of situations where you draw the side edges of your cylinders as being parallel on the page. For example, cases like 99, 118, and 123 to name a few. The reasoning for this is explained in these notes.

Continuing onto your cylinders in boxes, it seems that you may not have followed the instructions as carefully as you could have, when it comes to the important stage of analyzing our results using the line extensions as explained here. 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.

Throughout your work, you've been rather selective of which lines you'd extend, only rarely extending all three sets of lines, but more often extending just two, and sometimes just one. I'm unsure as to why this is, but it does unfortunately severely limit the effectiveness of this technique. Just as with the line extensions in the box challenge, if we only focus on some of the lines and neglect others, errors can accumulate in the area that was not being checked, undermining the purpose of the exercise. So, if we check two out of three sets of line extensions, we can end up in a situation where the proportions of the box are still way off, but the partial analysis suggests nothing is wrong.

Before I mark this challenge as complete, I will be asking you for some revisions which you'll find assigned below.