I agree: WIN! WIN! WIN!
The loser was the guy sitting on the couch working on his heart attack. Now you have a goal. Keep doing your regular rides and maybe challenge yourself just a little bit then try it again in a couple of weeks.

By the way, you are way tougher than me....longest I ever did on a MB was 25 miles, what's that, about 40k? Took me 3 hours to finish and two days to recover.