I looked at a job this morning and among other things the HO's wanted a railing installed on their existing EP Henry steps. The steps have bullnose treads. The exposed stairs (5 steps) lead to an elevated patio. Is it possible to install a railing after the fact? They were thinking something like wrought iron. There are mulch beds on either side if that helps any. What do you guys think? I may sub it out if it is too complicated.