Just a follow-up on my project. I drilled holes on bottom of the pan, filled the voids and patched with a product called Duramax 4040. I then filled the pan with water and let stand 72 hours. No leak. I have another question. I'm going to put in sliding glass shower doors, Is it necessary to put blocking behind on each side where the end rails fasten to the tiled walls? I read where it only says how to drill into the tile and install screws. The backerboard isn't up yet. Thanks.
When you say 'end rails' I assume you are refering to the side rails. If so. then no, you do not need to block for them. The actual weight of the sliders are carried by the top rail wich rest on the side rails. The screws are basically just keeping the side rails from simply falling over. If you think to might want grab bars now or down the road, now would be the time to block for them. Same goes for a seat if you think you might need one of those someday as well.
Good job on fixing your pan problem!