There are shims in the upper ball joint? There weren’t any in the 3 Tractions that I have had. Doing as I describe always seemed to work well. Tighten it, then back off a bit so it moves freely and all is well. On my Light 15, I removed the upper and lower races and switched them around and eventually with occasional adjustment they bedded in and were fine. I did it that way as the joints were heavily worn from use on unpaved African roads and I figured why spend the money on expensive ball joint kits if I didn’t have to.