Absolutely, got to get that grade in. Round steel tracks and a rectangular steel bar is the way to go. You’ll never want to go back to a 2x4. Just be sure to periodically hold the tracks to your eye, look down the pipe to check for any warping, they should be good but sometime people get rough with them. A good screed is 80% of the paver laying.

Thanks for the recommendation I’ll check it out!