First attempt to replace the flapper valve failed to quite the gurgling. Second attempt, and this project also follows that golden rule that any home fix requires at least 2 trips to the hardware store. Still gurgling. So I spend my evenings watching toilet repair videos on You Tube. I cant believe my life has sunken to this. I bet Elizabeth Holmes doesn't fix her own toilets, heck shes such a god, I bet she doesn't even go to the bathroom.
Swapped the brand new flapper valve I just bought with another one. Gurgling finally stopped. But wait.there's a leak now. Turns out when you disturb an old shut off valve it can start to leak. One more trip to the hardware store, install new valve. Then another leak, reinstall new float assembly in which I had installed a component upside down (That one I had to re-read the instructions which I had already thrown away). Wait 2 days, another leak. Tighten new shut off valve. Finally good.
Now I have a great sense of satisfaction in completing the job myself and since I am not Elizabeth Holmes I must now leave you..I have to go to the bathroom.