2019 IMFL in 10:27 while dealing with a cold. No doubt in my mind that if I was healthy I would have been closer to 9:30.
My advice would be to REALLY nail your nutrition on the bike. And to do so means you need to train the crap out of your nutrition. I trained myself to be able to take in 100g of carbs an hour (now I’m up to around 120-130 before I start to get sick to my stomach). But to do that it means you need to constantly consume your nutrition on your ride. And that can get expensive quickly if you buy premixed stuff (Tailwind Maurtan etc.). So look into getting bulk maltodextrin and making your own.
Best of luck.