A 43.3 was the highest I got when testing, although a simple small ride height adjustment would gain me 1 or 2 tenths a lap and improve turn in, but would make the tyres run out 2 laps sooner. Any faster than how I have it set up would burn the tyres too quickly. I'm considering slowing it down a bit more to get to the tyre wear that would be best.
I have plenty of time to test in the week so I'll try a few things. My team have already been sent what would have been the final setup. Your 43.2 makes me want to adjust it, as I was happy with a certain pit strategy. The closest I'd seen someone get to my times previously was in the practice after last week's race, where a JRM driver got within 3/4 of a second of my times on that day.
Time to do the opposite of the ride height adjustment I mentioned...