[Han Solo yt 1300 pilot ability]

When using Hans pilot ability, how many times per round may you use his dice modification. 
 

obviously you can only re roll ONCE per roll (ie attack, defend, or obstacle resolution, you can only re roll once for each), but is there a limit per round on how many checks you can re roll? (Ie, re roll for obstacles and then attack and then defend, or just one of them?)

[Hondo Ohnaka crew ability]

When using hondos crew ability it allows you to choose 2 ships in range of you that are friendly to each other (can be enemy ships, as long as they’re friendly to each other), you jam one and coordinate the other. When coordinating an enemy ship, would I choose their action or would my opponent (the one flying the ship) choose the ships action?

[Ionized activation, bump]

If a ship is Ionized and then attempts to complete the ion activation, but bumps the ship in front of it there for not completing its movement and not taking its focus action, is that ship considered to have completed the ion activation and no longer ionized?