Dan, If you are going to try a full on Doujin then I think it may be a good idea to look a little more into the PC image software side of it. You are obviously a very skilled cartoonist and I have really liked all your shorts, but for a full out project like this then maybe inking, layout, speech bubbles, fonts, cleaning etc should get a bit more of a look in. At the moment your xlnt pencil to paper skillz are shining great, but the PC side of the images is letting them down.
What software do you use to edit the images once they are scanned in?
EDITI am t3h suck with image editing but I thought I would give this one a try.
Please forgive me.

Trying to extract your Line Art = 40mins
Slapping in shoddy Photoshop = 10mins
