Hi Gizmo, I don't have one of the necks with me, they're in the UK. But I'll do my best to answer your questions based on the Moses neck the Aurok necks are based on. The radius is fairly flat so probably 16". The profile is a shallow d shape, the string spacing at the bridge can be whatever you like, I'm not sure what the spacing is at the nut, I'll measure a Moses neck tonight as a guide, and get back to you with an edit to this post.