On inside corners, I've used tape. On outside corners, I've used a metal corner bead with tape flanges (I think that's the term). It's worked for me, but I'm no professional.

Funny story... I used a sledge to break out my old tub. The sledge bounced off the tub and into the toilet and broke the bowl in half. The good news is that the toilet was getting replaced anyway. The bad news is that there was water in the bowl.

I throw away practically nothing. I have 2 containers (costco size containers from mixed nuts): 1 for salvaged screws and 1 for salvaged bolts. I have smaller containers for washers and nuts. After that, I have a small shelf system that I built from MDF trim and hardboard where I keep the 1 lb boxes of fasteners from the big box stores. I have very few nails. Most of my boxed screws are Phillips head with lengths from 3/4 to 1.5 inch. I then have a 1 lb box of 3 inch torx head screws. I was fortunate (?) enough to have a contractor leave a 20 lb box of drywall screws (1 5/8" I believe) after they finished my job. I, nor any of my friends, will ever have to buy drywall screws for the rest of our lives

Is there a pic I'm not seeing? I see 1 bad quality pic on the original post. How can you tell where the pipe is located in relation to the top and bottom?