OK, I must not have been really clear there. Hull and siblings should be sibling. Heirarchy should look like this:
Model
|-----Hull(LOD0 Geo)
|-----AnySubSysModels(If Used)
| . . . |-----SubSys(Geo)
| . . . |-----H_SubSys(LocLight)
|-----...
|-----Turret01 (Turret order isn't essential; don't stress over it)
| . . . |-----Turret01(Geo)
| . . . |-----TurretArm01(when applicable)
| . . . | . . . |-----TurretArm01(Geo)
| . . . | . . . |-----H_TurretArm01(LocLight)
| . . . |-----H_Turret01(LocLight)
|-----Turret02
| . . . |-----Turret02(Geo)
| . . . |-----TurretArm02(when applicable)
| . . . | . . . |-----TurretArm02(Geo)
| . . . | . . . |-----H_TurretArm02(LocLight)
| . . . |-----H_Turret02(LocLight)
|-----Turret03
| . . . |-----Turret03(Geo)
| . . . |-----TurretArm03(when applicable)
| . . . | . . . |-----TurretArm03(Geo)
| . . . | . . . |-----H_TurretArm03(LocLight)
| . . . |-----H_Turret03(LocLight)
|-----...
|-----TurretXX (Last Turret)
| . . . |-----TurretXX(Geo)
| . . . |-----TurretArmXX(when applicable)
| . . . | . . . |-----TurretArmXX(Geo)
| . . . | . . . |-----H_TurretArmXX(LocLight)
| . . . |-----H_TurretXX(LocLight)
|-----Detail1 (LOD1, MUST be named Detailxx or detailxx; order of details is ESSENTIAL)
| . . . |-----Detail01(Geo)
| . . . |-----H_Detail01(LocLight)
|-----Detail2 (LOD2, same conditions as detail1)
| . . . |-----Detail02(Geo)
| . . . |-----H_Detail02(LocLight)
|-----Detail3 (LOD3, same conditions as detail1)
| . . . |-----Detail03(Geo)
| . . . |-----H_Detail03(LocLight)
|-----Debris01
| . . . |-----Debris01(Geo)
| . . . |-----H_Debris01(LocLight)
|-----...
|-----DebrisXX(Last Debris should be at most 6 unless you are running a source mod that allows more)
| . . . |-----DebrisXX(Geo)
| . . . |-----H_DebrisXX(LocLight)
|-----H_Hull(LocLight)
EDIT: Space removal is a pain; this should make sense (I hope)
Someone save a copy of that and/or add it to a tutorial on ship building
