Great work from G (worth watching)...
Wonderwall: https://www.periscope.tv/w/aIUjIzY2NDk3MTR8NDc1NTI5ODFxa0QL-twNxNcgRqeR9wLdw8xLq8PvkgnXYA4vIPrP_Q==
Stick with this one past the music: https://www.periscope.tv/w/aIUl1DY2NDk3MTR8NDc1NjA2MDdmJNI-yy46KS3YMQRtfs-B1bZUGtmujnH6aduWGP3_mQ==
We are...
As a novice to this, I don't understand this point.
The distance, elevation and time are all in the public domain - surely from those anyone can work out 'the numbers' relating the performance, or is there something else?