I think is the first time I post the draft design of one of my drawings. So, here we are. Many times I do this. What I do is, make a draft sketch on a plain paper(it's important to be plain, about 80gr) without many details. Just so as to create the forms, maybe to make some little details on the faces so as to help me later. Then I put this paper on my lightbox and front of it a new paper, a "good" paper, I use opalina 300gr, it's very suitable and it works with pencils and inks perfectly. Next I trace the design I see under the good paper.So this is the "trick" I use, nothing strange to many artists.