I have a very nice example of a 1918 DWM I just got. About 90%, perhaps less on the strawing. I am not a very good judge of this. No pitting, gouges, or anything of that sort. All matching but the magazine. What would having it redone professionally(Thor or Lugerman), do for the value? Also, what would be the "proper" type magazine for this gun, wood bottom or the alum pictured?