Where do I drill a double channel stair nosing? Home › Forums › Quantum Flooring › Where do I drill a double channel stair nosing? This topic has 0 replies, 1 voice, and was last updated 5 years, 9 months ago by Tim. Viewing 1 post (of 1 total) Author Posts 3rd July 2015 at 2:50 pm #276 TimKeymaster on the back channel Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In