I'm currently remodeling my bathroom. I want to change the handles and faucet on the roman tub. The house was built about 20 years ago and has Moen on it now. Someone told me it is not possible to change just the trim, handles and faucet. They said I had to replace the valves and so on under the tub. I don't believe this for a minute, but I could be wrong. How do I find out what would fit it?