Congrats on finishing drawabox! I'll do my best to give you feedback so that you can improve.

Starting with your form intersections, everything looks great! You clearly understand that the intersections occur between the surfaces of forms so there isn't much else to say.

For your boxed cylinders, everything looks good apart from the fact you forgot to check the sides of the cylinders. A good rule of thumb to follow is that there should be 6 or 7 lines extruding from each side so if you have less than that you've missed some.

For your vehicle form intersections you've done them perfectly. This exercise is here just to remind students that what we're dealing with is just simple primitive forms at the end of the day.

Finally for your vehicle form intersections, you've demonstrated an extreme amount of patience and care and have carefully built up your constructions line by line. To be honest there really isn't much to critique other than the fact that you've only included orthographic plans for only 3 vehicles. For this lesson I believe it's absolutely essential that you do an orthographic plan for every vehicle. I'll explain why anyway so forgive me if you have done one for every vehicle but forgot to include it. The reason why orthographic plans are essential is because they take the decision making process out of the 3D construction so that we can focus more on the construction part while doing it. If we focus both on where to put everything while also trying to construct it the exercise can become overwhelming and we might not get much out of the exercise if that happens. Also if we properly subdivide the o.plans all we have to do is copy them onto the 3D construction which you've no doubt demonstrated.

I also appreciate that you've drawn all the curves as straight lines as it can be very tempting with these subjects to draw the curves. While this may have caused your vehicles to look "boxy" it shows that you've stayed true to the core of the lesson which is precision. It also shows that you treat these as exercises where the final result doesn't really matter much instead of trying to decorate the vehicles and make them look "good" which demonstrates that you understand the core principles of drawabox.

And that's about it! This is certainly one of the shortest critiques I've written and that's definitely a good thing as there wasn't much to critique. If you have any questions or if anything was unclear don't hesitate to ask.