How big is the I/D of the 2mm jets you are using lee?, Cathar used 0.8mm IIRC...
The cups don't need to be flat at the bottome do they?. I'd have thought a ball end would be best, but a normal drillbit V would 'deflect' the water up and out of the cups better than a flat bottom would...
How big a 'square' are you making with your cups lee?. For a P4 I'd try maybe a 1CM square...
How thich is the plate you're starting from?. I'd like to try 3mm with 2.5mm cups...
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