What about getting extender bits and putting it from the rail to the other wall? So instead of it running across the top if the stairs like now it's coming down from that other wall to the rail?
I think if you are worried it will come loose then don't have it at all, better to be kept on your toes watching all the time than hearing it go and not being able to do anything about it ifywim
We had the same problem so we did this View attachment 38075View attachment 38076
We had the same problem so we did this View attachment 38075View attachment 38076