Bon Ramat..... As for advice. PRACTICE PRACTICE PRACTICE.. Try running different setups as much as you can to learn what the car do's etc...
As for tweak . I set ride heights then set the tweak on the track. Then after i get it where i think it is correct. Then i will set it on a tweak board and see where it is then go back to that setting before each run....
Before the race i do not have a ritual . I just make sure the car feels balanced and not tweaked if possible. But nothing out of the ordinary...
Nexus.. For that motor on that size track try starting around 29-30 / 100 .. then go from there.. I would try a carpet setup for outdoors with foams. I think they will be closer to what you want then a rubber one...
JohnB.. Try running the exact setup you run with pink rears.. This will stop the traction from going away.. This seems to be all we run now...