I am looking to buy my first precision rifle and have been pondering the DTA, AIAT and custom platform for about a year, I have just bought everything I need to start reloading as well. I know I want a 6.5mm creedmoor. My next will be a .223 trainer, a friends custom .223 has been my favorite rifle for years. I have always liked thumbhole stocks like the AI, but I really want to try a KMW. The ability to change barrels and calibers has been a huge draw to the AI, however can a custom be set-up with spare barrels? I just don't want to have to send in my action and have down time when a barrel is shot out. Do I have to send my action in to have the barrels made? Does the same smith that builds my rifle able to save the specs on my action per say and make me barrels if I call? I'm willing to buy tools, so if I can have my KWM and change my own tubes that might make my decision easier.