I'd love to do this event someday.
It is amazing so do try.
Just had a look at splits, which are an excellent antidote against hubris (which I was starting to succumb to.) There are 4 legs where I lost at least a minute including one where I lost 2.5 by not seeing an opening in some stairs so went a really long way round.
Everyone else had similar problems (some way more than me), but still things to improve! On the other hand it gives me hope that next year could indeed be better.