I don’t know what he weighs - I’m guessing not a lot, because his FTP is roughly 300w, which isn’t massive in absolute terms.
I think in all events like this there is a relatively small group of guys who have a realistic chance of winning/placing and a much larger group who are doing it just for the experience.
One of the things that was putting me off was getting my as$ kicked, but looking at the power numbers above, I’d hopefully be able to hang mid-group. Hopefully! 