So, I see a lot of folks on the forum have swapped barrels on their HR Handi-Rifles at home, themselves, as opposed to sending them in to the factory. I wondered if there is a guide someplace or directions for a Handi-Guy to do it himself? I have what I believe is an SB2 receiver with an NT serial number made in 2009. It is like brand new and currently has a .50 caliber Huntsman barrel installed. I would like to have a .30/30 or .45 colt barrel for it if I could install it myself. Any advice?