... Now I am waiting to see If it will give me
a headache / hangover or a visit to the ER ...

The buzz lasted an hour or two. Its now the morning after and I am
still alive. I didn't get the headache/hangover that I usually get
from most budget Californian wines.

... 2.5 lb of red seedless grapes from my local grocery store.
Crushed each grape with a hand garlic press ...

That was the funniest post in a long time.
Tell me you are a stand up comic
and not really using grocery store grapes....

Last night after the wine buzz wore off, I went back to my local
grocery store and bought more grapes (cheapest ones, which were again
from Chile) and blueberries. This time, instead of crushing them, I
put them thru the blender and dumped it into the 1/2 gallon mason jar
with the prior must. This morning, the mixture was starting to a ooze
out like an ice cream popsicle so I transfered the mixture to a larger
tupperware container.

If this is true, you have great promise in local wineries
here in this state. No I am not tell you what state it is. smile.

California?