Your questions have been answered but I'll throw my

in here anyway.
I have 4 authentic Erls and all work perfectly with Ni200. As you know, connections are key when it comes to nickel builds and achieving steady resistance. To that end, I bought a set of jeweler's precision phillips head screw drivers to crank down on the coil leads. The Erl's 510 pin sticks out ever so slightly so I went ahead and installed the provided washer (under a sticker on the side of the box) on all of mine.
I prefer spaced coils with nickel myself. Initially, I was using 28g spaced coils but found them rather hard to wick without destroying the coil. I have since started using dual twisted 30 gauge and it's helped a lot. I'm not sure how much of this thread you've read so I'll post these images again.
I have the 2mm posi post installed and have removed the afc ring as well to acquire as much air flow as possible and really like it. I vape 70-80% VG juices so to help with wicking I don't put anything down the vertical channels. I also do not install the
"wick ring".