I've probably struggled for longer on a few of the Circuit Experiences (Tokyo's walls, Mount Panaroma's downhill corkscrew) but Master S-10 did make me question whether I had learnt anything in the 99 previous licence tests. After a few hours I was still 0.7s shy and baffled as to where I was losing time. I'm adding my tips in case it helps.
I use M/T and TCS 0, Counter Steer Strong and Brake 3 Rear (not sure how important last two are but saw others using this)
Exit casino in 2 smooth power to full then rev out 3 & 4 then straight to 6. No idea why using 5 is slower but certainly felt I was hitting max speed much earlier missing it out. I was crossing S/F line at 153-156mph in line with Demo.
First corner is where I think I was losing 1 second, combination of half-braking, pushing stick hard right and gunning down the gears whilst getting car into a nice final smooth slingshot out to kerb was tricky to master. First time I think engine braking from down shifting seems to be important. I tried spacing the downchanges to keep some revs going, exited in 3rd to reduce wheelspin allowing smooth power on. Check time to end of exit kerb and anything over 15s is lost time.
The S curves - less haste more speed, when you are chasing a time, it's easy to be greedy in one turn and lose it in the next, also the racing line is not the ideal line. You don't want too much going round first left nor do you want to be up on right hand kerb as that seems to throw you towards left side of track going towards second curve. I tried to blip throttle (not too aggressively) after exiting each curve and getting car into a rhythm. I used 3rd, I guess 4th lets you be more aggressive on throttle but i felt I had less control of car speed. Being right side of track going into Dunlop is important (ignore racing line) which meant a tiny bit of braking and using 2nd momentarily going into penultimate left hander to keep as close to inside kerb as possible. The split here is hard to check given you are entering Dunlop but anything higher than 29.1 is time lost.
The next subtle revelation was coming around Dunlop and initially finding it hard to brake as late as 50 for Degner. I think I was still slightly arcing right to left coming down that short straight, whereas getting the car fully straight on left side of track allowed for later braking (at 50m) and getting through Degner faster then using 3rd to exit turn 9 to avoid wheelspin and the next split should be sub 47 as others have mentioned. I was often in the mid 48's so I had no chance of Golding until finding the 2 seconds I was losing up to this point.
The first time I got a mid 46 time here, I got my Gold so the rest of the lap seemed straight forward. I exited the hairpin in 2nd and I got into 3rd quickly to avoid wheelspin but the rest was usual maxing the gears I didn't use any more double gear shifts and I got a mid 1.43. The best part about having to do Casino at the start is that it is like an old friend at a time when other tracks (like Spa) it would be a concern that you can easily throw a good lap away in slow fiddly corners when you are over anxious to get the hammer down.
I'm grateful for all the reference laps people have posted, I watched quite a few and was amazed to see a lap 2 seconds under Gold, some really great driving. If anything I am happy it took me maybe 8 hours and moments I doubted if I would ever achieve it. It felt a very fitting final test, the iconic car and track, containing a lot of subtle challenges to get a good lap time. I have finally got 100% on everything on my dashboard and all the trophies. I think maybe from time to time I might see if I can shave more time off those Master S1 to S10 laps but otherwise I think that's enough stress and frustration for now
Another few hours of practice to get down to a 1.43.080 and I decided to call it a day - I've added a video with tips in case it helps anyone else
Master S-10 Gold Tips