A 90 degree day in Houston showed me I had leveling all wrong
I used to swear by a 4 foot level for screeding big slabs. Last July we poured a 300 foot driveway in Houston and I fought the bull float for hours. The sun was brutal and I finally tried a laser level with a receiver on the straightedge. That day I stopped trusting my eye and started trusting the beam, never going back. Anyone else made the switch after one miserable pour?
Wait, wasn't the problem your eyes or the level itself? A 4 foot level only checks 4 feet at a time, so on a 300 foot driveway you're basically eyeballing the rest between setups. The laser didn't fix your eyes, it just gave you one steady reference over the whole pour instead of a hundred little guesses.