I started out doing like you, but I learned that it is much better to pick an original rifle, related group of rifles or maker on which to base your work. It makes your style decisions easier and you have a finished product that is at least close to historically correct. Where a given builder varies their style considerably, I pick what appeals to me. You need to be careful, though, to take time period into consideration. Styles changed with time, and so did some long lived builders.