Will be interesting to see how bad my errors were, seeing as you beat me by 11 minutes. I'll claim 5 for stuff ups when I'm sure I would have seen the flag, most notably when at 15 and I couldn't see the knee high termite mound, even when trying to navigate from the correct bit of rocky ground right next to the control...
I don't think any of us actually spotted the mound before the flag, so we did have a pretty significant advantage. :)
I didn't, but was running straight at it by chance. I lost 3mins plus at number 3, and probably 30s or so at 17. Otherwise ok I guess.