It will be cool to add some sentryturrets.
i imagine the text file like so:
Name Test Turret
ShortName TestT
Skin SkinTestT
Icon IconTestT
Model ModelTestTurret
ShootDelay 10
--Sentryturrets can shoot grenades, rockets and bullets--
ShootProjectile bullets

--this field can only be used when the turret shoots rockets or grenades--
ExplosionRadius None
FireOnExplosion None