I've got a leaky bathtub faucet. I know the hot water tap is the culprit, as I can temporarily stop the leak by turning it harder than I'd like to. The tap has a decorative cap on a long screw, but when I remove it, all I see is hole. I was hoping there'd be a screw under there I could try to tighten. Anything from this point, I'm turning off the water. I was a little scared just taking off that rose. I want to be careful, because I'm not sure how much I could service this tub if something went wrong. Can anyone tell a brand from these pictures?