It's a 493 kb zip, how to make a CPU waterblock from aluminium and acrylic complete with object drawings in dxf and stl format.
It is NOT meant to be the best ever CPU waterblock. The idea is an introduction to making something a bit more complex than a sign or lithopane on your CNC mill, specifically more than one object that has to fit together as components to make a product.
It is also not meant to be a masterclass or hold your hand every step of the way with step by step instructions, the idea is to make you think, and give you a practical and cheap project to practice on.
Archive contains archives of the dxf / stl models, index.html file, and some sample .nc files, just download and extract to hard disk and open the index.html in the browser of your choice.
Have phun.