Thought this was a pretty good run. Started really strongly and after the first map (at #9) was in 2nd place, only 30s down on Rich Robinson.
Maintained that 2nd place all the way to #18 with some really good splits.
Lost time on #16 aiming for a small gap in the purple (which was present) and missing the no-gap in the actual building - realised in time to correct, but too late to get the overall route choice right. Not a massive time loss though. Lost a bit more time from hesitating due to reading the contours wrong on #18; again, not much time lost. Lost more time on #19 but again not much, my route was a similar distance to the best one but had more steps/slippery paving. These three controls in total are probably a minute.
Then my only actual mistake was on #20 where I failed to visualise what the control was going to look like; was just thinking 'steps and canopy' and nothing about their orientation or what was going to happen on the way; either of which would have saved me. #21 my route was slightly circuitous. #22 was the only mistake winsplits thinks I made - I tried to avoid a very tiny (<5m) amount of climb by going a significantly worse route through some trees - lesson learnt.
One more bad choice on #27 where I again I took the shorter route with more two sets of steps; lots of controls close together wasn't really planning in advance. Failed to cut a corner on #28 as well.
Basically reading this back, it all fell apart at about #16 which was when I snapped the magnifier off my compass - I think it got caught on the gripple. Obviously I lost concentration for a bit, but it's probably more down to tiredness that I wasn't making the best decisions nearer the end. I felt I was running pretty well though.
Good use of the area, glad I went to this event.