Well didn't read all the posts but I'll throw up a few random thoughts.
I started with Para's original idea of using a 22mm vial.
22mm .35oz Vials with Cap
And the vinyl grommets that were linked to.
Vinyl Grommet 5/16 Bore Diameter
here is what it looks like.
The bottom of the vial is just cut off. In the cap you need to drill the correct size hole and set the grommet into it. Basically the way they are made to be used.
There is one more piece you need to make though, if you want a truly universal and hassle free loading version.
That is the shorter one I made, I have a slightly longer one too. It gets shoved in the top cap's grommet. It's an atty tube with the cut off portion (the o-ring end) of a drip tip shoved into the bottom and the top takes any drip tip you want.
Do a dry run and get the top piece to properly mate with the carto, shove into the correct position. It should be obvious how easy it is to re-fill. To fill just add your liquid and screw on the top till you make contact with the top grommet, then flip upside to finish. No pressure problem.
The same grommets work well with the 3/4" OD polycarbonate tubing. Here's another way.
Again using the separate top assembly which makes both these so versatile. You can use any size carto you want. The Boges are about 35mm long the Smok DCs about 45mm. You can also use slotted Clearomizers, the regular or the XLs.
One tip, if you like slits keep them right at the bottom grommet and run them up at a slight angle. Then if they seem too big (leaky) you can move the grommet up a bit, covering part of it. Same thing with you hole if you are a puncher. The carto in the pic is a Smok 1.7Ω single, they
rock and are less temperamental with regards to hole size and seem to last longer and draw a bit better than the DCs.
The nylon thumbscrew cap is from HomeDepot, there is a silicone washer under it like in the first pic, it's from an older CE2, pic 2 uses the carto end cap. Pick ur poison.
Basically combining ideas by Para , Vermonster and yzrmbsg from VF. And me of course.
