Suspect the nylon sliders in the track have broken. Does seat "rock" back/forth? Pieces may jamb up sometimes,and not others is my guess.
Winner 2001 Road Course (prep. class) Detroit,MI
Winner 2006 Drag race (SS class) Indianapolis,IN
Quickest event reaction time .013sec. (final-round)
Class Winner 2014 Charlotte,NC. 2016 NOLA car shows
Winner 2019 Road Course (prep.class) Pittsbugh,PA