I have a 20 ga Connecticut Shotgun RBL launch edition. I need to buy a tube wrench and extra tubes from them. I would like to order tubes and wrench at the same time. There are two tubes in the gun. I know what they measure but I don't know how Galazan marks their chokes. Would someone with a launch edition 20 tell me what their choke tubes measure inside at the muzzle? Thanks.