I ended up getting a Swiftech Apogee XT from Micro Center (Gift Card). I used the Fat Boy fittings on it with the o-rings from the Swiftech fittings.

I got everything back together today. It's been leak testing for about 5 hours. I am pissed though.

My stupid DD Acetal/Acrylic/Delrin whatever the f it is made of, T is leaking around the Fat Boy fittings ever so slightly. Exactly like the fittings on my DTek was above.

Why can't there be a fitting that is made to tighten down and not have the o-ring bulging out the sides? These Danger Den Fat Boy fittings are great on the barb end, but they suck on the o-ring end.

Well, actually the Fat Boy's have done fine in five places.

1. The DD CPX-PRO has never shown the slightest sign of leaking.
2. My Swiftech MCP320QP has never shown the slightest sign of leaking.
3. My old Swiftech MCW30 never showed the slightest sign of leaking.
4. The Danger Den fill port I am using on my T-Line has a Fat Boy. LOL.
5. Now that I changed the o-rings on the Apogee XT, it looks like it won't leak anymore.

Why, oh why, does that piece of junk Danger Den T have to leak now? The fittings, and the T, are made by Danger Den. Shouldn't they just work?

How is it that these parts are machined specifically for liquid cooling PC's, and there is ANY guesswork in the fittings, o-rings, and how they seal?

Sorry, I am just ranting. I am probably just going to pick up a Polypropylene Anti-Microbial Y fitting to replace it. So sick of these little leaks. Freaking dumb.