Looks great Hostile. I'm in the process of sourcing the materials for mine and then I'll start the post.
So far I've got a 3D Printed Lightsaber hilt on it's way and a Black Series Kylo Ren voice changer Helmet as a base as I'll be making heavy mods to it.
There are a few posts on the RPF about the material for the clothing. I think that will be the hardest to screen match. There is also a post about the possible mechanics of the helmet but I'm not going to worry about that right now.
Good Luck!