I've tried a lot with the BB and ended up at 3/6. I have seen some 53.6xx but I could never beat my previous best time... the last sector is a mystery to me .
I did a lap that was a bit better in T3, but my replay is for the next best lap? The game is really messing with me right now, saving the second-best lap replay from that session. Think I'm done for this week, this is a lot of fun.