Nate Nagel wrote:

...that is, I started an "easy" project and it ended up being way more
work than I anticipated.

Sounds familiar. I started the day replacing a toilet fill valve, a
simple 10 minute project. Things went fine until reassembly when I went
to align the supply tube with the fill valve and the slight flexing
pressure broke the corroded outlet port off of the supply valve. I
figured no big deal since the supply valve didn't shutoff anyway and I
had to use the main shutoff. Out to Depot for a new valve. I get back,
grab my plumbing kit and start prepping to solder the new valve on.
After cleaning and fluxing the cutoff stub from the wall and the new
valve I go to assemble them for soldering, only to find they don't fit.
Seems the pipe from the wall is oversized (type K?). Back out to Depot
to see if I can find something suitable, which of course is hopeless. I
ended up getting a 1/2" FIP valve and then taking a standard 1/2" sweat
to 1/2" MIP fitting out to the shop and boring it out to fit the
oversized pipe. I soldered the modified fitting on, cooled it, put a
healthy amount of teflon tape on and assembled the valve. Amazingly
enough when I turned on the water nothing leaked. 10 minute project
turned 2 hour project *sigh*.