I’m of another school. I never take my scope off and I have never had a problem as a result of leaving it on when I remove or install a barrel. I also sell custom rear entry action wrenches in tee handle or 1/2 inch square recess configuration. The recess is for the use of a torque wrench if you are so inclined. We make the action wrenches custom to any action. I don’t advise the use of a port action entry action wrench because I’ve seen the scarring it can do if not properly used. I also sell barrel vises.