Finally finished replacing all of the fixtures in the Master Bathroom today. It's been quite a process, because getting into it I had no idea fixtures were so brand specific. So the wife bought what she wanted, and then turns out I had to remove the access panel under the standalone tub, cut the copper supply lines, put in all new fixtures and repipe. It was also a giant pain to replace the tub drain, as it was so tight just using a normal pair of pliers to thread out the drain resulted in breaking 3 of the 4 arms on the cross. Long story short, it was a pain. Today I finally was able to get the drain assembly back in the tub, and had it leak on me twice. After loading it up with some plumber's putty and really cranking it down, I was unable to get the tub to leak again...however. Don't you just get worried about what's going on behind closed walls? I filled the tub to just under the overflow opening to create the highest amount of pressure the seal should see, and opened up the drain and couldn't get it to leak. Even did it a second time to make sure...and no leaks. But still...man I'm worried. What type of project have you done, where you were a little concerned about what's going on behind the wall after you close it back up?