Can you play Not So Fast to counter an opponent's Salvage if they intend to target your gear?

Ruling: Yes, you can counter Salvage with Not So Fast if the opponent chooses to target your gear. Salvage targets on finalization, and the opponent must declare valid choices at that time.

Sequence:

• Opponent plays Salvage
• On finalization, opponent must declare their choice (targeting a gear or choosing no target)
• If they choose to target your gear, you can counter it with Not So Fast
• If they choose not to target any gear, you cannot counter it

Nuances:

• Salvage uses "up to" language, making "no targets" a valid choice on finalization
• The opponent must commit to their target choice when the ability finalizes, before you decide whether to counter