^ well said, I heard that advice off B. J. after an Oran Park track day (he had a pro sit with him). Made a very noticeable improvement in my driving.
Was going to expand on my previous comment about hand positioning. For me, it's more with having confidence in the car/grip. Since I've done only a few track days, and having crappy front tyres, at Marulan I did't use the 9-3 position as much, since wanted to have a bigger range of motion mid corner (car was a bit skittish). At Eastern Creek South, since the corners are a bit more smooth and 'round' (plus slightly better tyres), tended to hold the wheel at 9-3 a lot more.
Understeer is understeer. I tried the 'slow in, fast out' approach so the car would get out of corners abit straighter, but crap tyres were crap. Also OP, did you find the R888 fall off after a few laps? I noticed this in fatz's BNR33 at EC south (after 3 -4 laps they started over heating I guess), and he complained about it a few times too.