^ airchecks? you mean showreels?
I had to listen to some of them in the past. Received one from a wannabe tennis commentator who recorded it in his bedroom. I counted him screaming "it's a back hand volley!" over 30 times in 3 games. It was a Federer match. That would be amazing, even for him.
The guy had no clue. Ended up on Radio 1.
Which reminds me. Bjorn Borg was great wasn't he. Got the job done and got out while the going was good.