I have replaced the wall-to-wall carpeting throughout my house with solid hardwood and have also replaced the carpeting on the stairs with hardwood treads. I would like to install a runner on the stairs. The stairs are straight. I have seen several videos on the installation process. They show different techniques, e.g. some start at the top and work toward the bottom whereas some install from bottom to top. Some use a nailing tack strip and some don't. Some use double face tape. Some leave a gap between the back edge of the pad and the riser and some don't. They use different gauge and length staples. Any advice would be appreciated.