Ok I have a quick prototype ready to go;
BP is 4.5mm thick and the holes (bit too deep to be called dimples
) are 3.5mm deep and 3mm in dia, the jet's are 1.5mm in dia.
Some of you may recognise the top part of the block, since it's cut down from my p4 direct die watercooling block, it has multiple layers, with diagonally opposing dual in and out.
I'll hook it up to my t-bred 2100+@2.4gig tomorrow.