Axle
You seem to be on my wavelength

, and that was what I was thinking... get the coolant in fast where it's required then get it out as fast as possible without it looping around channels unnecessarily or causing any flow restrictions. Soldering and polishing I'm definately getting quite good at now, experience counts
Not sure it could easily be a "productionised" block or for that matter any one would want a block with 4 outlets, but I just hope it now performs as well as the theory suggests.
Forgot to mention I milled the base when it was all soldered together to about 3mm thick, (although it will be thinner where I'd drilled in between the pins.) I also got a little carried away with socket relief, milling far more width away than need be although it won't affect the blocks use at all. If you look at the top pic you can see the pins down the centre barb.
Milling it was fairly simple on paper but quite complex to set up and keep true and in spec. The hardest part really was holding on to it when the "X" shape was being made.
I left two small parts of the base in tact in the corner of the "X" like webbed feet on two sides to mount the retention mech. It will be simple thing and add to the looks hopefully.
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8-Ball It may be part of a much larger
Bit-Tech project but I posted it here as this is a water-block forum and wanted feedback / improvement ideas etc from other water block constructie type people