uh what do I have? not sure. In my garage theres normal handtools, most useful for this is probabily a dremel. Available to me easily is a drill press, which I can kind of use for the big things. Harder to find but possible to get to would be a CAD machine, I know what theyre called but the name slips my mind at the moment.
I'm probabily better off with designing around me. I saw (gotta find the link) an article where they made a waterblock out of the bottom of a soda can and an alum plate, and it performed not bad. I want to be able to do that but make it perform WELL. This is mostly for the fudging-around factor in any case, but if I stumble on some awesome, easy to make design, I would love to have a Kronchev block