Well after reading VaporHead4Life's post here:
http://www.e-cigarette-forum.com/forum/cartridge-mods/51588-clear-pvc-mod-prototype-idea.html
And the posts referred to in Eclypse's first reply to that post...
There's really no reason to post any further details of my idea - my idea is not new, except for my method of plugging the end of the straw with a bead of hot glue, which once hardened, should not be reactive with the liquid.
To answer VaporHead4Life's question - my method draws like a standard cart.
The only issue so far is it isn't wicking as easily - but that most likely is a function of too much foam in the slug. Need to experiment with that...
But, frankly, I think it's a lot of work that's not worth the results.
A manufacturer needs to make a molding process to simply make the liquid tank in a cart bigger.