Great! These boxes are very well done and a lot of them feel very solid & 3-dimensional. In addition, your hatching here is much neater and seems to have improved greatly.

I think you did very well trying to focus on the whole of all of your sets of convergences, though, I want to mention a few things.

1. While YMMV, one thing that has helped me a lot is utilizing the ghosting technique to ghost further towards my VP's in order to help me better visualize how & where to draw my other lines. Here's a thread about this that Uncomfortable answered: https://drawabox.com/community/submission/LHBWHX1

2. I should have mentioned this, but, the most accurate placement back corner is not necessarily always going to be so easy to find even if your convergences are holding up well. I found this to be the case for a couple of your boxes, and this can be remedied with just a bit more planning/observation (I, personally, meticulously go about ghosting and placing dots to find the best placement for my back corners). I made this example using one of your boxes to help illustrate what I mean: https://imgur.com/a/cKRVIJz. The revised box obviously does not have the most accurate placement of the new back corner, but I hope you can see what I mean.

   Overall, I feel that you have are pretty ready to move on, as (especially if you do warm-up's, as is recommended) you are most likely going to have lots of chances to continue practicing and bettering your boxes & how you, yourself can go about constructing them.