As far as the spaced or pressed coils, it’s a matter of preference. I’ve tried both, noticed slight differences, but nothing major. I think the spaced coils (you use less wraps so it will still fit obviously) seemed to gunk up a bit less, but nothing major. I use both.
As far as coil brushing and pinching. Yes, yes, and MORE yes. There are tons of videos on it. It’s easier than you think. Once you load fresh coils you want to start pulsing the power to them. Most times you’ll notice they fire like CRAP !!! This is OK, and normal. You can brush/stroke the coils with ceramic tweezers, then pinch them. Start pulsing again until you get a nice even glow starting from inside of the coil out. You’re trying to get evenly firing coils, that glow at about the same speed/intensity, also removes any hot spots which cause only parts of the coil to fire, and/or uneven firing/glowing. It’s too easy to get excited about most times. Pinch, pinch, pinch, brush, brush, brush. Obviously this mostly applies more to pressed coils, because if you pinch pinch pinch spaced coils, they won’t be very spaced afterwards.