Same battery I bought, seems to be a good piece. My stator is dead and I had the bike out today for a wash and moving it to the garage stall. The battery kept starting it right up even though it was down just below 12v. (have the trickle charger on it now) Gonna rip the stator out next.
Found out the starter won't even try with the left side bolts out of the battery box, it loses the ground there.
For future reference, baking soda is good for neutralizing battery acid. You can mix it into a paste and apply or dissolve it in water and spray it on, then rinse it off. In a pinch, I've used pop, soda, Coke, on car batt terminals, it's the sodium that counteracts the acid.
Yours will be fine the way you did it though.
Those pics are good evidence for going with an AGM battery, the vent snafu had everything corroding under there. Good catch.