It is indeed in my autoexec - it starts together with LFS and I can get into edit mode, as mentioned.
I'm happy to see your suggestions, I was wondering whether it's OK to ask

. I can think of 3 averages that could be useful:
1) Average lap time since your last pit stop (or leaving garage if 1st stint)
2) Same as above but as you mentioned with a cut-off treshold to not include bad lap times due to incidents. Not sure if you can make it configurable, I'd be thinking either 102% or 103% of current average could be cut-off. User configurable value would make it more universal.
3) Not sure if possible - whole drive average since start/garage. Wouldn't work in endurance with driver switches most likely but for solo might be useful.
Even if all possible, 3 new fields is probably too much/unnecessary. I'd put no. 1 and 2 as most useful.