Hi and congrats on completing the challenge. I'll be taking a look at your submission today. https://i.imgur.com/8PqQLE0.png I'm seeing quite a bit of improvement from these first few pages towards the the last 200 or so boxes. In the first few pages I was even noticing some boxes that had diverging lines which you seem to have completely stopped doing by box #50 or so which is really good to see. Just solving that problem even if you aren't nailing convergences really goes a long way towards construcing boxes that look very solid. The improvements that you are making past those first few pages are now becoming much more subtle and that's probably the way it's going to be for a while now. You are extending all of your lines correctly and it's pretty clear that you are always thinking about the vanishing points during your box constructions.

There's also a pretty big improvement in line quality from that first page towards your last page. I'm still noticing that while adding line weight you are sometimes reverting back to drawing from your wrist which is making some of your lines look a bit wobbly thus destroying the integrity of the initial confident line you put down. This is something you should really try and work on and try practing the ghosting method when adding line weight and drawing from your elbow or shoulder with confidence. It's going to be harder at first but the results will be much cleaner once you get the hang of it. Eventually you might develop enough control that you can add line weight with the wrist much more cleanly but right now it's adding quite a bit of wobble to your already smooth and confident lines.

It's good that you were drawing your boxes at a good size but I do think that you were probably putting too many on one page at times and with all of the extensions it's really making things hard to parse. Just something to think about when you do the 250 cylinder challenge. You'll end up using more paper but it will be easier to spot mistakes.

Overall this was a really good submission and you showed a nice deal of growth in terms of your box constructions and your line quality. I'm going to mark this as complete and good luck with lesson 2. Keep up the good work.