>The likelihood the angles and geometry of your home are square
This is true...it might be square on one plane and off on the other. That's what the 6 foot long levels are for by the way. It's good to find someone who has the tools and expertise to apprentice from -- either at a local cc or just hire them and ask if you can do some of the work. I went through several contractors before I found the guy I like to work with...I guess its the same in everything...but once you figure stuff out like that blasted little semi-hidden copper pin that's between you and a replacement shower valve, a lot of cost savings can be realized. The first time I replaced that thing, the plumber charged me $270. The second time I replaced it, I paid $19 for a part at home depot and did the rest myself.
This is true...it might be square on one plane and off on the other. That's what the 6 foot long levels are for by the way. It's good to find someone who has the tools and expertise to apprentice from -- either at a local cc or just hire them and ask if you can do some of the work. I went through several contractors before I found the guy I like to work with...I guess its the same in everything...but once you figure stuff out like that blasted little semi-hidden copper pin that's between you and a replacement shower valve, a lot of cost savings can be realized. The first time I replaced that thing, the plumber charged me $270. The second time I replaced it, I paid $19 for a part at home depot and did the rest myself.