Lots of places to start here
1 - May I suggest a smaller first attempt - like a 5 gal or even a 3 ? It's easier on ya. My first few were too large and I smeared them badly, total losses. Smaller at first is better , less time to do, easier to learn to use heat increments, and not a huge cost if things go badly..
2 - You are correct about the foreshots - althou I'd probably go to 250ml to be safe on a batch that large - but you can tell - it's greasy and stanks of nail polish remover - Once you are there it's nose and feel will alert you
May I suggest a thread on novice guide to cuts that I found extremely helpful when I got started?
http://homedistiller.org...pic.php?f=15&t=11640 And, if you've got time, do read the other stuff in the new distiller lounge over there. A ton of good experience awaits
And in the end, you'll see it's about nose and cuts vary batch to batch.. Jus takes experience
About holding or folding the tails, some do, some dont - It's a matter of preference or recipe. I add my tails to the next generation of same for sweet feed, but corn I save until I have a gallon of tails (aka low wines) to rerun along with a gallon and half of distilled water.
Or (and I have not had the time to do this) - reflux the tails and get as much good neutral out and charcoal filter to make flavored. It's like an artists palatte, or chef's taste - it's how you will like it
I should also tell you I was completely new to all this when I first came here too.. Most all I know I have learned between HD and here-and doing it. Welcome!!
Happy Stillin'