A small update,
I didnt know this was possible, but , now , some of our airio combos allow S1 drivers to join , I mean, even if the server is S2, if the track and combo running is configured with S1 cars and tracks you will be able to join our server, once the combo has finished and the track rotates automatically , you will be kicked from the server if the new combo is S2 Only.
This allows S1 drivers to enjoy our server too :-)
Regards