I wish I could post a new thread, but alas.....
I have come up with a very simple but effective mod for the Dura C cartridge but it should work on all cartridges of similar design. Twisp (Janty in South Africa) are very interested in the concept and they have eluded to a year's free supply of liquid if they can use my idea. If I could post a new thread I could share the method with you all -
opensource you know.
I don't want to steal the brilliant SFY plug thread, haven't tried it yet, but mine seems to work so good I don't see any reason to try anything else!
The benefits are simple:

Entire cart volume taken up by liquid - no wasted volume

Cart delivers liquid to atomizer to the last drop - no wasted liquid

Easy refilling, no airlocks. 18 - 20 drops, everytime

100% smoke and liquid to atomizer to the last drop
Now, if an admin member could activate my account to a level where I can post a thread, I could share the idea....
Cheers,