I tried to copy every step you did (for practice, of course) and it was ok until I had to use luminosity layer. I am drawing not with Paint Tool SAI but Photoshop but I don't think it should be soooo different > <
Maybe you can look at it quickly and tell me what I did wrong?
i.imgur.com/PT8iq9Z.png The V is drawn on Luminosity layer.
Even though I don't use Sai, I'll find it very useful to work with as a reference.
is it bad that while im looking at this im saying in my head "first you do this, then this, then this..."
Anyways, good job, very beautiful.