I love reading all the different techniques. Since the low wines I collect vary slightly from batch to batch, and the containers I keep them in don't always mean the same abv going into my whiskey still, I agree that paying attention to temps is pointless. Taste/smell and clarity when mixed with water (a la the way scotch whiskey makers determine their hearts) are how I move from heads to hearts. I cut from hearts to tails purely by smell, but in general it's just above 100 proof. The wet newspaper smell is generally how I notice where I make it. That said, I don't sell white whiskey, and thus all of my hearts go in a barrel, so I'm probably cutting to tails later than guys/gals who are bottling the spirit white (or as moonshine) - want those more complicated parts to interact with the barrel.
Like you, I want to read a lot to see what I'm missing, or to learn of new techniques. Make a few smaller batches and mess around a little, see what works and what doesn't. It's what I'm going to keep doing. Also, I'm using a smaller copper still, and while it has a 10 window column on it, I don't use the dephleg. I've worked with a bunch of different setups, taking the column off, taking the dephleg off, adding a copper onion dome, etc....but it has rarely if ever mattered to what's coming off the parrot. Very consistent flavor and process over 50-60 batches.