In regards to the Trans Canada Gold ride, it's a 75 hour ride window. The IBA doesn't list times on your cert. No one will care what your actual time was except you. I suspect you refer to the "record" in Thane's blog, which was only a record for him. No one keeps public records for rides on public roads. He was using a fuel cell. His average speed was 99.9 kph, which is a challenging average to maintain on that ride. Note that he only took his helmet off three times. IOW, he kept moving. Not everyone can maintain that pace, or should.
Fuel - At some point you need to go for a ride with a small bit of extra fuel and find out for yourself on your bike what it really does to true empty at your normal travel speeds. When the bike dies, then you can toss in the extra fuel and go find a gas station.
Also, awesome that Chevron offers 94 non-ethanol. Wish we had that option in the US. But don't forget that you'll get fewer kms/L on E10 if you can't score the non-E fuel.
Part of endurance riding is about routines. Food and Caffeine - It's better to keep to your normal routines/rhythms for the most part, but what you're trying to do is avoid peaks and valleys in hydration/hunger/caffeine/etc. You shouldn't be relying on caffeine to get you farther down the road. Learning your body's 'tells' as
@Jay Bolinger mentioned is key to this. For me, if I think about taking a drink, that's my cue to take a drink and I do. Many small sips are better than few large ones. I often read about people only slugging down a water or gatoraid at gas stops and not drinking while riding. That's not an effective method. You will NOT recover from dehydration during a ride if you allow yourself to get dehydrated.
When you need sleep, nothing is better than sleep. We all sleep in cycles. Understanding what your cycle duration is helps. I sleep in 3 hour cycles. If I just get up after a 3 hour cycle of sleep, I'm rested and alert. If I set an alarm and make myself wake up in the middle of that cycle, I'm groggy and out of sorts and not at my best mentally for a while.
Sleeping next to the bike is sometimes counter intuitive. It seems like the quickest and easiest idea, but if you're not getting restful sleep, it's just wasting time that you could have spent in a bed getting restful sleep. I would suggest you plan at least one sleep stop at a motel into your Trans Canada attempt, if not two. Riding a 10 day rally, I rode 20 hours a day, was off the bike for 4 hours and slept for 3 hours. As long as I stuck to that rhythm, I could easily maintain it. That gave me time for a hotel and a shower each day. Sometimes the shower was as beneficial as the sleep cycle for getting me fresh and ready to ride another long day.
Every bike and rider is unique in how things fit and what works. I personally found the Mad-Stad set ups for my Super Tenere to not be helpful. There were other issues at play and having an adjustable screen didn't help them. On some bikes, moving the screen farther forward is a bad idea and creates more buffeting. If you like what you have, stick with it.