I called a company called Accuscreed today
www.accuscreed.com to check out a screeding system they have (I ordered the starter kit to give it a shot). While talking to the rep there the guy mentioned a company called Pavetech
www.pavetech.com because he had some ideas of tools to use with their screed rails. Looks like some pretty cool toys!
Anyway, I thought I'd mention it and see what everyone thought.