allow me to say, this manufacturing method is by far, the cheapest, as far as high tech equipment goes. it is also the most versatile as far as design options. It is the soul reason Why I can literally, in a matter of 10 minutes, communicating with someone on the other side of the world, design and finalize a 100% customized block,
to put it in another way.... If I was AMD, I would have been able to build you your CPU, to your spec, via Email and I would have been able to do so for less than the norm as far as mass produced product available.
and it's all thanks so this manufacturing method. It took me 4 years to get it fine tuned, And I'm still improving every time I make one.... the beauty of this.... doing it with CNC would greatly enhance accuracy and speed.... but it is absolutely not a requirement. a Steady hand and eye, and you will do just awesome... as them pictures prove, That for a very first effort... is way much better, than my first effort... My first one, ended up getting the hole cavity cleaned out...

none of the holes was where they should have been