Fair enough, I think @Sandus and others including myself prefer to do events on the Expert server because of the elevated realism and professionalism, as well as the possibility of having IFATC online. But again, it is your event so no criticism here just letting you know why they asked
Looks like a fun event, might join in if I have time!
I prefer events on ES, and @Toby172 has correct that it is because of the elevated realism. I was curious why this was on TS, much because I initially was planning to offer to be ATC at the event, which is not possible if it is on TS. Anyways, have a fun event!