Yeah I could very well be making it more complicated than need be.... But I think I will still stick with the pins. Maybe...
The smallest roughing endmill I can find is 1/8" and I would have to do it in one pass. In other words I would mill out the block as I want it then stick the roughing endmill in and make one pass with it to rough the sides up. Thats going to be about a 1/4" deep pass and I am not sure it will work with my small mill. Non the less I will be trying it. If i stick with the middle inlet I could add some dimples around the inlet area. Being three blocks will be in the same loop I don't want to add anything to increase volocity as that would also create a added restriction. I don't want to use to big a pump.
I have considered making the middle pin a cone shape. If I do I will just take the dremel to it. if I stick with pins....
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