Since Kanans pilot ability reads "....you may spend a focus. If you do, the attacker rolls one less attack die." Now I've been playing it so far as Kanan can only do this once (spend one focus) per attack, but it struck me (since I'm not an English speaker) that the "a" vs a more definite "one" could be interpreted to mean that Kanan will reduce an attack by one die per focus spent but with no upper limit to the number spent.
Thoughts on this?