I HEAR SO MANY HORROR STORIES ABOUT REGLAZING THE TUB. CAN I BUY THE PRODUCTS MYSELF AND DO THE JOB MYSELF? OR JUST TAKE THE TUB OUT AND BUY ANOTHER ONE, WHICH I CAN FIND A GOOD TUB, I DO NOT WANT THE TUBS THAT FEEL LIKE PLASTIC. PLEASE SOMEONE HELP! JENNIE COLUMBUS, OH