There are many ways of building a ss mesh coil, but this worked for me (if you're interested, if not, please skip this post

):
1. If you're using the mesh that came with the rba, just take it and roll it around a straightened out paperclip, or something similar. Roll it tight.
1 a. Some people actually oxidize the mesh before it's rolled by torching it about 3 to 4 times before rolling it.
1 b. I've tried both ways, and didn't really notice a difference, but your experience can vary.
2. Oxidize the mesh by using a torch (a lighter will not work well, and you may be disappointed). A small handheld torch costs about 20 bucks, and if you're going to be doing a lot of this, that's a good investment. You need to torch the mesh from one end to the other. Make sure it glows orange before you continue down the mesh.
2 a. If you've already oxidized the mesh before rolling it by torching it 3 to 4 times, you only need to do it about 3 times max.
2 b. If you've rolled the mesh without oxidizing it first, you need to torch it about 6 to 7 times, cooling it in between torchings.
2 c. Cooling: you can cool the mesh between torchings in 2 ways that I know of: 1) air cool it (takes longer) 2) stick the mesh in water, then dry it using paper towels or some kind of drying thingie (yes, I did say thingie

).
3. Using some type of e-juice (pg or vg, or the juice you plan to use the mesh with) by coating the mesh and using a lighter, burn off the juice. Do this about 3 times.
4. If all goes well and you haven't burnt down your house (I almost did), then you're ready to put it in the RBA.
5. Depending on your wire gauge, and resistance per feet (or meter), calculate what ohm you want, then cut about an inch more. Once you get this one down, you probably won't need to waste so much wire.
6. wrap one end of your resistance wire around the negative screw (not the center post, it should be the one closes to the hole the wick goes into) about 2 times first and tighten the screw (this will make the rest easier, I swear).
7. Wrap as many coils around the mesh, keeping in mind that you'll probably need a little more than the extra inch you cut to wrap around the positive post, which you'll need to wrap about 2 to three times (2 times is plenty, but if you mess up here, you can uncoil it from the positive post easily and rewrap the coil if need be).
8.
Test RBA to make sure you did a good coil and not something that's going to short out your mod (if you have a mod with short circuit protection and reads ohm, you should be fine).
9. Set the voltage around 3.3 and fire your device. If you do this in a darken room, it might make it easier to see the coil glow. If the coil doesn't glow evenly, it means you have a hot spot.
10. Using a toothpick, adjust the coils by moving the part of the coil that doesn't glow up or down, and do this to the entire coil until the coils glow at the same time.
11. Once you get all coils glowing at around the same time, put a few drops of liquid on the mesh and fire it, making sure it makes a lot of vapor. If it does, you're ready to put the cap on and get vaping!
12. If something goes wrong, don't blame me. Please.
OK, now that I've written all this, there are tons of videos out there that'll show you visually what to do. Just thought I'd help people out, or just waste your time. If you have any questions, you can ask me, or some veteran who probably knows 1000 times more than I do about RBAs.