[BButturff]

Just want to let everyone know what my solution was. First, since I prefer not to buy new reflectors and I can't "fix" my existing reflectors I decided to replace the existing focus screw with a longer one keeping in mind that a screw that is too long will ground the headlamp socket.

The original is a slotted 10-32x3/4" machine screw and I replaced it with a stainless steel 10-32x1" machine screw. Next, I determined that the tension spring was also too short so I added two 5/16" stainless steel washers stacked between the spring and headlight bucket. Now the focus mechanism works as it should and, more importantly, a bulb can be inserted and twisted without the entire socket twisting. Voila!

Lastly, based on the input from all of you I'll be upgrading to LED headlight bulbs in the very near future.