Remember, also, that the actual ability value numbers are 5, 10, 15, 20, 25 for BP I-V. They just multiply them by 4 in the description.
So, a single CQ has a built-in boarding defense value of 4. IIRC, explicitly assigning a Boarding Defense ability to it stacks with the built-in ability.
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The Unpronounceable Krsqk
"Well, sir, at the moment my left processor doesn't know what my right is doing." -
Freefall