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It's a co-op design, so not for profit. I'll be making a few, just charging for time and materials. It'll probably come as a kit of parts, rather than assembled and ready to go. I'll include the custom-made parts, leaving the buyer to source a couple of common parts, and put it together.

I've just posted one to the co-designer (Christophe) for testing. If he's happy, I'll make a couple more, and figure out pricing.
One thing I need to do is find another source for the terminals - seems I bought the supplier's entire stock!
They are sold as RC plane parts - quick links for connecting pushrods to servos on small foamies.

Been working on this over on UKV. Inspired by ideas from forum member Christophe, and input from other forum members. This is Mk2, and probably the final design:










It doesn't leak (unless it's turned upside down), is very hard to flood (holds around 15 drops and still works), and vapes very nicely.

You must mix with a different type of person to me, as I feel that the opposite is true of the general public - 90% see e-cigs as a quitting device. In fact, every single person that I've spoken to about e-cigs congratulated me on giving up, and asked when I felt I'd be able to stop vaping. I had to explain that I had no intention of stopping, I enjoyed it more than ciggies, but I didn't want to die a painful and early death. I then had to explain that nicotine wasn't the evil drug that they think it is, and that it isn't the nicotine in cigarettes that gives people chest and lung problems.

Totally different, percentage-wise, on e-cig forums, though.



Not sure where I stand on the regulation debate. Classification as a tobacco product makes it easy for the State to tax the juice and hardware, while pharmaceutical classification means masses of red tape and endless delays for new products.
However, it's easy to get prescription drugs through the back door, with or without a script. I don't think that the hardware would be affected at all - are syringes and ointment applicators subject to regulation?
Pharma classification may be bad for "off the shelf" starter products, and many vendors would lose out on juice sales, but it probably wouldn't affect the hardened vaper, who already buys mail order. They would just have to go direct to China for their nicotine base.

I don't feel that the government will do anything, until tax revenues from tobacco drop at a faster rate than they save money on health care. In fact, financially, the state would be better off if everyone smoked - save a fortune on pensions and geriatric care if we all died early!
I don't suppose the tobacco companies are that bothered, either - they have huge markets to tap in the "third world"for traditional products. Nothing stopping them switching their marketing and sales efforts from ciggies to juice in developed markets. Don't they already supply the raw nicotine?

I filled the tank on Saturday evening, them left it sitting until Sunday afternoon - no leaks. I've been using if since then. Works fine. This particular carto works best for me at 4.25v. It's the first one I've used from a different supplier. The previous batch were best at 4.1v.

I'll be fitting a foil switch to my next VV mod - the foil arrived too late for this one. I like your idea of using the membrane from a remote control - it'll give some tactile feedback, useful for vaping in low light conditions.

Here's what I built in the end (thanks to Lee for giving me the idea of using this case - he said "Nothing in Maplins to fit your specs?" - I took his comment literally!):







Plastic spectacle case, with internal home-made carto tank and custom mouthpiece. The various case fittings and bulkheads are made from 2mm styrene sheet, "glued" in place with Plastic Weld solvent. The tank lifts out for carto replacement, but can be filled in situ via the small screw.
Two 800mAH 2-cell LiPos in parallel, voltage regulator, LiPo low-voltage warning LEDs and voltmeter. It all works, but I need to charge the battery and fill the tank. Should get time to try it later.


I've got some balance/charge connectors on their way from China, which will let me tidy up the power wiring, and make charging a lot easier. I've also got a mini rocker switch, which I'll add at the same time, as well as a pico fuse.

If I get on with this mod, I'll build another. I'll use a nicer case colour next time, and fix the parts permanently, rather than use hot glue.

Yes, total length between the connectors, so you add a bit more to go inside the connectors.