Just drawing the image took about six hours. See that confusion of lines at the top right? I drew the tower in pencil, and then went over it in black Sharpie. Then realised I'd drawn it wrong. Sharpie can't be erased.
So I redrew the tower on paper; transferred it to the block (the yellow is the transfer powder); and drew it again in red Sharpie.
Oh, that's going to be so much fun to make sense of when I cut that area.
I've started cutting the block. Slowly.
