Space Urchins (Oops/Typo)

I was scanning my typing, and found a small section where I had apparently
fallen asleep...

It should read:

2) Thrust equal to the class of the spine, which is applied somewhat
differently depending on whether vector or cinematic movement is used. See the
movement rules below. A spine used in this fashion also generates HALF its
class (round down) in thruster points. A ship consisting entirely of Class 1
spines receives 1 free thruster point.