Ok so this is a block I made with a mind to test my skills and see what the limitations would be with using a dremel instead of a mill to cut waterblocks and at the very least I have learned a lot:
The initial sketchup I did on the block was marked for cuts 2mm apart based on the assumption I was cutting grooves about 1mm thick, there's a couple of mistakes on it, but since it was only a test I wasn't too worried:
End result after cutting:
The 2mm spacing on the entrance side with the channels I found was a bit close; where it crossed over it essentially left nothing but a rough surface. I think I would use a 3mm spacing instead next time.
For the pins:
I decided I wasn't really going to be able to do the 2mm spacing and leave anything worthwhile so I left these as 4mm spacing and then widened the channels a little. Again I think this would benefit from having 3mm spacing between the cuts, which is what I plan to use on future projects.
This was all cut in 3mm aluminium from a skanky old thermaltake case I had lying about.
I'll need to get a few more bits before I can actually test this block, a nice thick plastic layer to hold it steady, some rubber cord to seal the edges and a Tap to be able to attach barbs to it...
I'm expecting a very high resistance block, I don't think it would deal with anything beyond water in it.
Anyway, tell me what you think for a first crude effort.