@dfriestedt Wow nice guide. I wish the events I have done had reports like this. Interesting about the wear and tear on the bike, navigation, and how you handled getting 300+ calories/hour in. A frame cracked! Glad you left the poisonous snakes to the end of the guide!
When I did STP 1-day / 200 miles, I ran a secondary battery pack in my top tube bag to my cycling Garmin. I wish the cycling Garmin’s had longer battery life. My triathlon Garmin has a battery life of 24 hours.