Hello Charles-San! The brackets for the TD1 models had number 145-82811/821-00. They have a small screw that holds the blade spring for the knurled wire adjusters. The brackets for the YDS3 had bowdencables with normal adjusting screws, so these had no screw hole. So they are nearly the same. These early racing ones were re-used for the TD2/TR3. Ludy Beumer