Brewday is done. Don't seem to have lost too much. I doubt even 12oz.
Hop stopper seemed to work pretty well. Large amount of hops on top of it. Still could see some going through the hose, though. I have an idea of how to make it a bit better.
Lost my siphon a bit early do to the air leak caused by no thread seal. But I think I'll still come out with close to five gallons at kegging time.
Now, I need to sit back and wait until it is ready to drink. Well technically, until it is ready to keg, and then to drink. Which is OK since I need to finish my keezer. Have to find a temp controller.