Noticed shower stall base not level inside (frame of base is level) AFTER remodelers were done with job. The ("plastic") shower base was set into wet concrete and a marble floor installed a few days later. Now when one takes a shower the water pools because the drain is pretty much the high point in the floor. You have to squeegee or move the water into the drain. My dilemma: is there ANY way to drill a hole on either side of (or anywhere on) the base and fill with concrete and let it dry and thereby raise/level the inside floor of the base??? Realllly don’t like standing in water when I shower… but will deal with it if it means tearing out everything. (NOT an option.) Thank you ahead of time for not making fun. LOL