No, I am not thinking of TWOK. I don't understand how Spock repaired the ship doing what he did.
Reading the other posts, would it have been impractical showing Kirk getting equipment for the climb or using a scaffolding device to get him to the damaged component? Certainly in that $190 million they could have spent some money on climbing equipment or a scaffold. Hell, they could have spent money on leasing a modern day scaffold, spruce it up, and film Kirk going up to the reactor. This is the equipment I imagine being available.