In the UK and AU I found both brass and plastic replacement barbs that are 1/2" on the output side.
http://www.radiical.com.au/Water%20Cooling.htm Has anyone seen these here?
Not sure how much these still restrict.
What is the "DDen mod"?
I also am finding that the hose tends to leak using a plastic hose clamp or the spinny thing. I am really suprised.
Thanks,
...Rich