My Shower Faucet Has The Old Three Handle (hot, Cold And The Center Is The Water Flow Diverter From Tub To Shower.) There Is As Much Water Coming Out Of The Tub Faucet As There Is Out Of The Shower Head. I Assume It Just Needs New O Rings On The Stem. After Removing The Handle I Am Unable To Remove The Stem. I Have Taken The Nut Off But The Stem Is Stuck. Do You Have Any Suggestions? Being Very Frustrated I Thought About A Very Big Hammer But Decided Better Of It Since I Didn't Want To Retile The Entire Bath.