No problem!

Actually, regarding your plotted points, I recently got critiqued by a TA who told me to use smaller plotting points. So I don't think it should matter as much if you've drawn them in only small size. You still do have to plot them there in the first place though.

And with getting consistent gaps, I think it's best to consider where you want to place a certain box that you want to draw in relation to one other that already exists. So normally, if I were to imagine the front plane of the box I want to draw, I would consider the edge of that plane, that is closest to the existing box. Then I would plot out the end points of the edge, while being conscious of how far they are from the box next to it (should be a narrow distance). Same goes with the closest edge of the back plane. Once you've drawn that box, then repeat the same process for the box next to it, with around the same distance. Does this make sense? Please tell me if it doesn't.