Rejected Because: This Idea still showed racking and was just not tight enough...

I've decided not to use Angle aluminum for the linear rails of my homemade CNC machine this time - because it was proving just too difficult to attach it to the T-Slot... Basically the screw heads were getting in the way of the bearings... So I looked for something that would sit in the t-slot channel and I found some 1/2" galvanized pipe that fit fairly well and should give me a nice rail for the bearings to ride on... I might have to sand it smooth if it's rough - I'm not sure about that one yet - but here's a look at the rails and a preview of the base so far... Don't mind the 2X4 legs - they are temporary :)

Rails Base Preview