I've been working on this one on and off for months. From the start, it took about three weeks to have it good enough to print, now I go back over it every now-and-then, getting the smaller and smaller flaws as I go. I should be done in a few years. I tried my hand at colorizing it, but haven't been very happy with the results. I've found a new tutorial that uses a different method for colorizing and will probably start working on that soon.