Forcefield vs Jitte

[Ace/Homebrew]

Google searches and Gatherer failed to inform me, so thanks in advance!

Opponent has a TNN equipped with Jitte (2 counters).
I have a Forcefield and an untapped land that taps for mana.

Does Forcefield need pumped into it each time my opponent removes a counter to give TNN +2/+2, or does the paid reduce the power to 1 as damage would be dealt without leaving an additional opportunity to pump the creature?

[kombatkiwi]

Forcefield doesn't modify the creature's power, only the amount of damage that the creature deals in the combat damage step. You pay 1 and choose the attacking TNN and then it only deals 1 to you no matter how many times they pump it or how much power it has.

[Ace/Homebrew]

Fun

Thanks!