Yeah, but I don't want to add a lot of weight to the actual block (with a big plexi top) and I would rather have the water flow out freely in a res sitting on top of the CPU, to which a barb could be fitted.
That way, there is no need for a plexi top at all. The waterblock's weight would be the copper and the barbs. That's it.
Also, the advantage of this design is that the center barb doesn't need to be secured very tightly, just enough so that it stays in the center.
I have thought about it a bit more, and was thinking about extending the fins towards the center, so that they could be tapped. This would hold even a cheap plastic barb, and allow the coolant to flow in all directions. If needed, the fins could have a copper plate (about 1") soldered on top, just to make sure that the coolant flows through the fins. Then, a few posts could be soldered on top of that plate, to hold the center tube, avoiding a barb altogether.
The insides of this block could be sandblasted (like the Maze 3) to increase the surface area. a 1 3/4 barb could be installed, to protect the thread (which is the hardest thing to do with this design) while it is being sandblasted.
I really don't know how I would tap a 1 3/4 thread in this thing...
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