I have begun my TRS Baker rifle build. A question. The rifle has a two piece breech section. A plug is already installed in the barrel, and the part with the tang where the plug inserts itself has a long vertical bar extending downward towards the trigger guard area. I believe this has something to do with the ranrod spring. Am I correct in assuming this? There is a screw that will go upward through the trigger guard ahead of the trigger, which I presume will provide attachmet for the ramrod spring, AND, will thread into the bottom of the tang vertical piece mentioned above? Any help is appreciated.