The cache is not at the published location; only by visiting all five of Moffat MRT's 50th Anniversary Caches will you discover the information needed to locate the Mystery bonus cache.
If you have managed to locate all five then you will have no problems finding your way over the terrain to the last hiding place. As always, dress appropriately for heading into the hills.
The caches that you will need to visit are;
The Postie Stone
Knockendoch
The View of Rotten Bottom
Rescue 131 Boulmer's Last Lift
The Crown of Scotland
At each of these caches you will find bonus information that you need to enter into two separate checkers. In the first checker, enter the bonus information from The Postie Stone, Rescue 131 Boulmer's Last Lift and The Crown of Scotland. Do not include spaces and separate each answer using commas, for example X99X009,999x,XxxxxXxxx
The coordinates displayed by the first checker are NOT the final coordinates, they are the published coordinates, you must use the second checker to enter the calculated coordinates from the bonus information found at Knockendoch and The View of Rotten Bottom, these coordinates are not the final location; the checker will give you everything you need to get to the final location and find the cache.
You can validate your puzzle solution with
certitude.