I am in the process of building a Bedford rifle, and was trying to decide whether to go with 3 or 4 barrel lugs. Many of the originals look like they have 4, but that seems to me to be kind of overkill if you go through the breech lug with the forward lock bolt. I decided to go with 4 to be consistent with the majority of the originals, but wouldn't 3 work just as well? Are 4 really necessary?