This is unrelated, but http://theartbot.com looks great! Do you want to submit it to HN sometime? Something like "Show HN: TheArtBot - Semiautonomous drawing machine" would be a great title. It would also be great to include text that gives the backstory of how you came to work on this, and explaining what's different about it (e.g. going into some of the details that you mentioned at https://news.ycombinator.com/item?id=27229274).