Is the wort hopped? If it isn't, starter away. If you feel that you need to boil it again, go ahead. Personally, i just bring it up to room temp, flame the lip, and go from there.
Corn sugar is dextrose. In those small quantities over the whole batch, you could substitute plain table sugar instead.
Was the 6 oz for bottling or in the boil?
Compare thermal loads. You are putting 1, MAYBE 2 cups of hot liquid into cooler liquid. IF any yeast is killed, there is far more than enough still in solution that will carbonate your beer.
That said, I've always poured my nearly boiling priming solution into my bucket and racked right on...
Yes, kinda, not really.
The theroy is that the aluminum will give you alzhimers. In reality, the ppm of al taken up by your wort is neglible.
Boil plain water in the pot to "season" it and you will be just fine.
Iirc, the term is passofication.
The only time I had uneven carbonation was with the two step priming addition. I just lay my tubing in the hot priming solution and let it swirl naturally.
I have not tried Pineapple, but at my LHBS, another guy brought in an amazing Mango IPA. IIRC, he dried a bunch of mango pieces, and ended up putting in 2 or 3 pounds of dried mangoes into the secondary. In combination with the "C" hops, it had a wonderful flavor and nice bitterness.
For what...
Carbonation looks good. Not overly large, but not overly fine either. I take that as there is still some particulate matter from the ground spices (etc...etc...) creating excess nucleation sites. It seems to be pretty on par with most craft beers I have bought (unfiltered, etc...etc..).
I...
yep and yep. I make .5 oz into 2.5 gallons, reserving a spray bottle (only used for Starsan) full for spot sanatizing. Basically, I dip (or spray) my hands down before handling anything that touches my beer, and I make sure that all the tubing has a full minute worth of liquid flowing through...