I am in the process of designing a retaining wall/patio/step project for a customer. I don't have a lot of specifics yet as to the actual design or wall system to be used, but it may involve having to install a hand rail for the stairs primarily and possibly the perimeter of the patio along the walls top. What are some options for installing something. Are there specific types of railings you like to use and how is the best way to attach/install them??