I'll be trying a STM soon. It just got shipped from FT. If I like it as much as a lot of people do I'll probably get more. They have them for $22 at FT.
Normally discontinued stuff gets sold off cheap but I think that might have already come and gone for the STM. There are hardly any out there in the USA. I just looked at spare parts and it seems like it would be more cost effective to buy complete tanks at this point. Are there any particular parts you would recommend getting more of?
Does the RBA give the same vape quality as the drop in heads?
I use the toptank mini and really REALLY like it. Basically the same but it fills from the top. The RBA for sure has better flavor and durability but there is nothing wrong with using the drop in coils if you prefer. I think they will eventually get discontinued though. If you are going to venture into making your own coils - I would get extra rba pieces - fasttech has them. The RBA piece looks like a regular coil head piece and you are able to change out the coil and cotton as needed. I have purchased quite a few. I use 5 or so that I keep assembled and I carry one with me so that if my coil burns out or something it is easy to swap. And I have 5 put away just in case any of them break. A lot of folks just build as needed.
I'm a bit klutzy sometimes and drop things so for me the Rba pieces sometimes go bad. The other part that has gone bad on me is the bottom airflow piece.
So I would recommend 2 extra airflow pieces, 2 extra rba pieces and some extra glass and o-rings. Fasttech has them all.
I do not do any fancy coil builds - just regular kanthal or SS316L and it is very easy. The coil ends are held in place with 2 screws (they just tuck under the edge of screw), then you cut off the excess and put cotton through the coil, put juice on the cotton, screw the cover on the rba piece and then screw the tank back on.
This is the video I watched - he shows you up close and speaks clearly
One more thing - I also bought premade coils -- we can give you links. They are not expensive at all and you can use them while you figure out how to do the coil youself or you can just continue to buy premade ones. They come between 20 and 100 to a package.