No worries! I did want to clear out my queue before the event started, but fortunately this one should be pretty easy because you've done a great job.

Jumping in with your form intersections, by and large these are coming along well, but one thing I want you to keep an eye on is the fact that towards the left side, the sphere/cylinder intersection doesn't appear to take the cylinder's curvature into consideration, as shown here. Always look at the different surfaces that are involved in the intersection, and try to identify/isolate the different curves at play. While curve-on-curve intersections are notoriously complex and challenging, they're still being stitched together from the same individual pieces - it's just that when we transition from the cylinder's curve to the sphere's, we don't have a clean edge upon which to place a sharp corner. Instead, the transition is smoother and more gradual, creating a sort of S curve from the two separate C curves.

One thing to note about your cylinders in boxes is that it is very much an integral part of the exercise that your ellipses actually touch all four sides of the plane enclosing them. If you recall, the ellipses are part of the error checking/analysis we do with the line extensions. The point is to place an ellipse that fits within the plane, then check if its minor axis/contact point lines align correctly. If the ellipse is far from touching all 4 edges, then the line extensions themselves don't end up telling us anything useful about the proportions of the box, so keep that in mind.

Continuing onto your vehicle constructions, it's really quite amazing just how far you've taken each of these, with the sheer amount of subdivision. The Mark V Tank is especially crazy, and I'm kind of shocked at how you were able to keep the lines consistent enough in your mind to take it to completion. I'm sure there were some little slip-ups here and there, but nothing so dire so as to derail your progress.

To be completely honest, I'm at something of a loss to really find anything negative to talk about here. Your constructions are thorough and complete, and the objects themselves come out feeling extremely solid and well built. You're demonstrating an excellent degree of spatial reasoning skill, and while I don't necessarily think your proportions have always been correct (the huey helicopter definitely seems a lot longer), that's not actually a point against you. Rather, it shows that regardless of how the drawing turned out, you stuck to your plan, and to your construction, and the result was an abnormally long helicopter, but a solid and believable one all the same. To be honest, I'm still not entirely confident that your proportions are wrong here - the construction is that solidly built.

So! I'll go ahead and mark this lesson, and with it, the course as complete! Congratulations on getting through it all, and - looking back on your first few lessons - improving as much as you have. Even at a glance, I can see that the level of discipline and patience you're able to muster far surpasses what you came in with - and all of that has been earned through your hard work.