You can manage & track your card collection and decks once you create an account and login.
They are set aside like actions played from a hand.
No. A player cannot attack during an opponent’s turn.
The opponent would take 3 damage total.
You would get the benefits of the upgrade immediately, with the exception of abilities that trigger from Chop Shop attacking, because that event would have already passed (i.e. Data Pad).
You perform the actions on the card in the order that they’re written, which dictates when effects are applicable to a given scenario. For example, if you’ve already played an Enigma to combine, you would receive the top bonus.
You can transfer all three Cargo Trailers.
No. It would stay attached, but would not activate upon combination.