That bit's not too bad, it's just a case of remembering the order the references go in. This is complicated for me as I read the book recently, and they're in a different order in that!

Um.

Inigo: "I see you're using Bonetti's Defence against me, hah?"
Westley: "I thought it fitting, considering the rocky terrain."
Inigo: "You must expect me to counter with Capo Ferro?"
Westley: "I find that Thibault cancels out Capo Ferro, don't you?"

I think I get a bit lost after that. There's a lot of mutual congratulation, Inigo asks Westley who he is and Westley tells him to get used to disappointment. Then we're up onto the rocks and into "I'm not lefthanded / I'm not lefthanded either" bit.