Yea my initial plan was to buy regular 20mm 80/20 without the v slot machined into them (more quantity less cost) and use the v slot wheels. Theoretically it will work because there are 4 points of constraint which will eliminate rotational forces about the 80/20 rail. But wearing will occur on the wheels since that constraint is a point and not a flat surface line.
Nonetheless, I'm opting for the flat V-rails that will mount onto the 20mm 80/20 with the v wheels.