I am going to get rid of a banister that runs along the staircase that goes to the basement and replace it with a knee wall with a cap and some trim work. The wall is about 8-9ft long and has a return at one end. How do I secure the opposite end to make sure it doesn't wobble? Do I run one of the studs near the end of the wall through the subfloor and bolt it to one of the floor joists or do they make an anchor plate for securing to a plywood subfloor? My knee jerk reaction is to run a stud down to one of the floor joists as this will probably be the most stable solution. Any thoughts?