I am remodeling the upper level of my home and was curious to know what people do with existing runs to the basement from the attic area. My basement is competely finished. If I'm taking walls down and moving them on the upper level, what do you do with existing runs travelling down walls that will be moved? The existing wiring is run through conduit...1967 vintage. Will I need to replace all that wiring and runs from the panel and fish to the basement?