I'm working on a CTF / Ons / whatever map, and I decided to try adding a turret for the middle checkpoint. The turrets.def file is in the scripts folder and the various turrets are available in Radiant's entity(?) menu. The turret is linked with the checkpoint (nice red line and all), but the turret does not show up in Radiant other than as a wire box, and it doesn't appear in the game at all.
So, any tips? Is the there a turret "sticky" somewhere?