4-5 - how about sticking on path to north of fields then east on south of marsh and use indistinct path past 7 to get near 5?
Also noticed you seem to waver on sone short legs - adds a lot of extra distance (percentage wise).
haha the course is actually offset a little bit which makes my route look wrong in places, so 5 should be on the open spur. I noticed that route when it was too late sadly.
Good point about the banana effect. As I was doing the control practice, I was stopping often at each circle also, but good point to note