I have, i saved the replay of it seeing as its been my toughest challenge so far

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Smoothness is the main thing here which is hard seeing as i had tc off. I also use a DFGT wheel.
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1st part:
The first right i took in 1st gear (carefully) as the gearing is really responsive and i can accelerate quick before turning left again. (speed through these first hairpins are just under 40mph)
The next right hairpin is probably the most important, brake a little bit late (but not too much) so you're turning a bit wide and slow down to about 35mph (this should happen after the braking zone so you're half way around this corner). The car should easily turn sharply at this speed whilst being able to accelerate in 1st or 2nd (carefully again so you're not drifting!) and stick more to the right hand side of the track already setup for the downhill left towards the wooden bridge.
This part may take several attempts as you need to make the left turn whilst at 70-80% throttle in 2nd, as soon as the car is heading straight you can put the pedal down for the 'straight'.
I know that when the car is at the end of the bridge you want to be at around 35 seconds on the dot, otherwise you're too slow and will be up to a second off 1:17 or whatever the time has to be.
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2nd part:
After the straight is a wider hairpin to the right that'll end up towards the tunnel, slow at the braking point like normal whilst starting to turn gently with the racing line, let go of the brake so the car is in the upper rev range in 2nd and hold that speed (without slipping/drifting).
At about 2/3rds of the way around theres a little white road or something on the corner near the apex where you can slowly start to ease in the power whilst keeping control, change up to 3rd just before the redline to accelerate towards the tunnel.
When entering the tunnel (shadow hits the car) you want to be 50 seconds or below, anything above it including 50.523 for example is most likely too slow or it wont give you enough time to drive carefully enough in the last corners.
After the tunnel slow down a little and turn right carefully in 3rd instead of 4th, ease the power in carefully so you're accelerating without making the car slide at the crest in the road and you can probably change to 4th for the left.
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Last corner:
This is the make or break point! Brake just after the racing line says so and try to keep your car on the tarmac till you can turn right, hold the revs after braking in 2nd and use good throttle control around the corner so the car doesn't slip.
Half way around the corner where it would start to sharpen up again you should be changing up to 3rd and keep a smooth line cutting the grass on the left kink just before the finish, smooth power delivery is vital and keep the car heading straight.
Finish!
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Hope this helps you i know a lot of people will struggle to get gold as well.
My time was 1:16.988 or something like that.