[Fixittt]

that is a very very nice rendering. Nice cad work.

I will leave the base alone and focus on the top of the block.

you say you want the fittings machined into the top of the block. Do you have any idea how thick the top peice is going to have to be to make that? and with all the extra machine time involved to make it. That and you will need a really long endmill, which will give you deflection. But that is no problem.

I dont really think the intergrated hose barb idea is worth the extra machine time involved. When drilling and tapping takes only a fraction of the time.