Hey there, Jay. Good job on completing the challenge! I love the box turtles, they gave me a smile.

Regarding your question about the line weight, yes you are correct that it is about drawing a new line on top of the old one. Remember to use the ghosting method and draw confidently from the shoulder. To practice this, incorporate the super imposed lines exercise into your warm ups and it'll get better.

In terms of overall development, you have made great strides in terms of the solidity of your forms and sense of 3d space. Your convergences are consistently improving as well. You already are aware of the application of line weight so I won't belabor that and I will go on to talking about converging lines. Overall you are on a pretty good track, there are some lines that get away from you here and there, but overall they are heading all in the general direction they should be. Occasionally your back lines get skewed and that is why uncomfortable has made the infographic. As you see, the "trick" to getting your back lines to converge with the others, or more generally, getting all parallel lines to converge, is to think of them as a family. They are all related to one another by the vanishing point and the angle between them is determined by the distance of the VP. Often times we focus too much on a single plane and the two pairs of lines then work on the next plane in isolation resulting in two points of convergence. When you begin to step back and draw each line with consideration given to all the other lines things start to fall into place. Over all you are on the right track though! You followed the directions carefully, applied your check lines and grew from what they showed you, and you did your 250. Challenge complete!