I'm able to get these stock iSub coils apart easily now.
Rich found me a good sturdy screwdriver of the proper diameter, so I hold the bottom of the coil head with pliers on the flat edges, stick the screwdriver through the wick holes, twist and lift, and it comes right apart with hardly any effort. However, I'm still thinking I'll get some of those RBAs because I had a few weirdnesses happen today, and I don't know what I did wrong. I made the new coil, held it in the top piece and ran the mandrel through it to hold it in place, flipped it upside down, put the rubber grommet back on with one leg inside and one outside, pressed it down, stuck the 510 pin part into that, clipped the wires short (VERY short), and put the bottom piece back on with the clamp thingie. But when I put the coil on the reader, it showed .02 ohms on the first one and .06 ohms on the other one (it happened to two out of the five I re-coiled).
The only clue I have is that the 510 pin and the bottom piece were harder to get on than usual, but there was no wire sticking out anywhere or anything. .02 ohms means a short, right? Maybe a wire inside the rubber insulator was out of position or something? I dunno, I took them both back apart (as they happened), and re-did them EXACTLY the same as far as I could tell, and they read at .49 and .51 ohms respectively. (See? I got 'em closer to .5!)
It seems like such a simple operation. I'm not sure what went wrong with the two bad ones, but after I re-did them, they were fine, and they fired perfectly when I put them on a mod. So I CAN do this, but I was getting kind of frustrated there for a while. Not to mention trying to keep track of where the wire bits pinged off to when I clipped them, not having a free hand to hold the end of it with. So I think the RBA will be easier because once the wire's screwed down I can just twist/bend the excess off, plus I won't have to try to hold the coil in the top piece, making sure it's aligned perfectly to run the mandrel back through it to hold it. I can just drop the whole shebang into the slots. So that's my best bet, but at least I know I can rebuild these stock ones if I need to.
I'm just puzzled as to what might have caused the .02 and .06 ohm readings on those two...
My coiling is beautiful, though, and I did it all by hand-wrapping.