Welcome to the machine.
TN or VT???
I was in Knox last Nov and saw one FiST and at least one FoST. My feedback on subjects that affect your 2019 FiST are none. What applies across the board are the first mods: RMM, IC, Cobb AP, OTS tune, short shift adapter, etc. Blend door actuator failure. Evap Purge Sol. etc.