Took me far too long to work out what I was looking for, here. Like “mandles123”, I even stopped and sat down to have a think about it for a bit. But after I walked away for a bit, and then walked back towards the GZ again, by GPSr decided that it knew EXACTLY where to go, and lead me right to the cache. Wonderful spot.
Picked up Signal Football! Tag. Shall find him a new home next week.