You definitely improved on estimating your convergences, good job on completing the challenge! Im having the same problem with thickening the lines, end up not meeting at the same point so we cant be the only ones lol. One thing I would add is that some of your lines, especially in the beginning, were a little shaky. It looks towards the end that youre getting better at making straight, smooth lines while mainting accuracy. But always focus on a confident, smooth stroke over hitting the mark.