MrBumble wrote:

A previous owner of my car tried the set screw fix. It proved to be only moderately effective, but the end result is not particularly attractive. The handle and post were never designed to accommodate a set screw. The inside wall of the handle is also too thin to properly hold a threaded screw and unless the post is drilled in precisely the correct position, the result will not be good. I thought about trying this method again, but decided that the simplest solution is generally the best.