On a side note I just rebuilt a Tabac BCC coil yesterday and it is working great so far. I don't understand why people are trying to go for lower and lower resistance. I am using a Ego V, and my rebuild ended up being 3 ohms. I just up the voltage a bit and the vapor seems to be much better than the 1.5 ohm I was using previously. Tried the first stock 2.2ohm and I think I am sticking with the higher resistance atomizers with variable voltage batteries, WAY less burnt tasting draws.
With the low resistance you have less/larger wire that heats up to a higher temperature at lower voltage. Below a certain resistance (1.8 ohm in my experience) changing the voltage does not do much, and the wicks cant keep up so you start getting burnt tastes. I realize this may not be exactly true for other 'mizers though. With a higher resistance there is more wire (at least in the one I rebuilt) so the heat is dispersed over more wire which actually gives you more vapor of a better quality than brute forcing it. The wicks and temperature of the coils seem to balance better and before where I was getting burnt taste every hour or so, I have not all day.
Of course the 3 ohm atomizer is useless with non-variable batteries, since the voltage coming out is not anywhere near what I am running at (4.5-5V atm, probably could go more but the flavor and vapor is enough for me)
These observations are just what I have experienced lately with the Tabac BCC, other 'mizers probably work different so really low resistance atomizers may be what works best for them.
If anyone is interested in rebuilding all you need is a paper clip, really small flat blat screwdriver and probably a philps screwdriver. All the pieces slide together and the coil is held between the sliding pieces. Only trick is seating everything properly and trimming to wires to avoid a short. I used these two parts for the first rebuild:
https://www.vaporgeek.com/shop/index.php?route=product/product&path=61_102&product_id=100
https://www.vaporgeek.com/shop/index.php?route=product/product&path=61_102&product_id=90
The second trick is to get enough wick so the atomizer does not flood, but not so much that the liquid can't feed properly. Using the pre made coil and dropping it in, and unravling the 1mm wick and stuffing in on top of the coil after mounted before putting the top post back on seems to work well. Also this setup is at 3ohm, less may not work well with this combo, but next time I want to aim for 2-2.5ohm and will post back the results.
Not sure if others are doing this, did some quick searching and did not see any results come up.
Edit: Forgot to mention I am in no way affiliated with vapor geek. They happened to have DIY supplies when I went to order 1.8ohm replacement coils that my usual store ran out of and I ordered a bunch of DIY to see if it was possible to rebuild since I was placing an order anyways. But from my experience they have been great.