You didn't finish. No wonder you had such a fast time! You skipped the sprint section - 8 controls on a 1:5000 map. Maps were in a map case next to control #43, your 11.
I was told at the start that there was a map exchange for red, no mention was made of an exchange for green, nor was there any indication on the description sheet. I saw the maps on the ground, but presumed they were for the red course. Oh well....
