Interested in potentially making my own CNC router for woodworking, with a capacity around a full sheet of 4x8' plywood. I currently use a friend's dual-spindle custom-made CNC with vacuum hold down table, and would like to build something similar or perhaps a router plus plasma cutter design. I enjoy doing SolidWorks modeling and have done quite a bit of work with 80/20 extrusions (though no motion, yet) and figured it would be a fun project to take on and I would certainly learn a lot about motion. I've got a good amount of 80/20 extrusions and fasteners sitting around from a little part-out project I recently did as well.

Is there any savings to be had from building my own versus purchasing a DIY kit from, let's say, cncrouterparts.com? Assuming roughly equivalent part quality, etc?

What are some of the most "tried and tested" open designs out there? Where would be a good place to start?

Thanks and sorry for the somewhat n00berific post here.

Ryan