Swiftech must have improved their metal barbs then? Because I have a pair that I refuse to use, they are pretty shoddy and don't really have a lip on them either.

Now D-tek barbs, yeah, huge lip on those. I use 7/16" tubing and I still use wormdrive clamps though And it is possible to pull 7/16" ID tubing off the 1/2" dtek barbs, I do it every time I take the loop apart for maintenance.