I had the same problem with the steering wobble on my Sprint. And I was using your method that I saw on here. But after a while I began noticing that it was starting to become loose again. not as bad but loose. After trial and error I came up with a new mod that has tightened up the right side servo saver and solved the steering wobble. Im gonna post how I did it and what parts are needed for this mod. Maybe somene else has already made a mod like this but I havent seen it in my searches. I hope that it helps all us Sprint owners fix their loose steering.