You should talk about how wide of pours you want to do, and how long I suppose. I don't have any experience with the roller type, but I think they would be even better than a vibra screed for wider pours and would allow you to use lower slump concrete.
I've never had reason to go wider than 16' and a vibra screed on an alu board was fine for that.
i was thinking all pours. less trouble than a truss screed and they apparently leave the aggrigate just below the surface and easier to assemble. plus they take up less space. i thinkin of using it for sidewalks to up to 30 foot pours. or is a slipformer the way to go for sidewalks
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