- Yes, cut the drywall from the other side (cut it professionally, not sloppily), and save the drywall piece.Concrete slab. It's sinking in how much I just screwed myself by being inpatient. I think the only way would be to start from the other side of the wall.
Once you open an access opening, you can determine the extent of your drain damage and what to do exactly.
I can't tell everything from your pic.
It looks like you may have some cracks in the enamel and even already some rust stipples. Dunno how long the tub itself will last, even if you can replace the shoe. We had a thread recently about someone who had a rusty-ass tub and was trying to fix the damaged areas with Bondo.
huh, interesting. It's hard to tell with all the scuff marks. What material is your old shoe?
Showers don't have to bother with an overflow.