Join Date: Jan 2009
Location: Worcestershire, UK
Scarabs have the 'stealth' USR (they are 'swarms', all 'swarms' get 'stealth' automatically), this gives them +1 to all cover saves. Turbo boosting gives the unit a 3+ cover save (which I think is clearly covered by "all cover saves") and as such stealth upgrades it to a 2+...
basically speaking its nearly impossible to hit something that small moving that fast