A shp has 8 different facings if im right. no need for more, seeing the game wont support more facings.
And the terrordrone is allready a vehicle, so i guess you can use the projectile as one, though it will look crappy
Im not sure what effect might more than 8 facings have, but its not a good one, since the game relies on equally sized squared celles in an iso angle. Having more than 8 facings, if working, means the facing will be inconsistent with the cells.
In addition, the locomotors are coded to either support infinite facings (for voxels) or 8 facings (for SHPs) – therefore, you'd have to edit the locomotors in order to make more faces work...
...which, as you might have guessed, are hardcoded.
He said something about the terror drone's projectile, maybe he wants to use it as a projectile. Or maybe that was just an example to show what he wanted.