As others have stated, the 1/4 NPT threads are overtapped so they will just barely seal--they did seal, though. It's weird that they managed to get the 1/8" NPT for the gauge right.
Some bits of flashing around the casting marks. I cleaned some off and then disassembled it to make sure the pieces weren't floating around the insides. This is when things went bad. The bottom plug for the valve seat is very poorly tapped--the threads stripped when I put it back together. There was also a lot of metal and junk on the threads that I had to clean off with a wire brush (might have been a mistake--that was probably the gunk holding it together.