Since an update I've made user Kinix noted "with the killgrid any new time is impossible" so i've now made it to where you can get a faster time. There is another hidden teleporter and an invisible glass pane where a killgrid wall was (just do a flip on the glass pane to regen boost). The hidden teleporter is somewhere VERY close to spawn as it always hides the best secrets.

Found a part of the map where a building was clipping through the map

Random road piece obstructed end of tunnel