@meowski @nyanide @waifu @shibao @georgia @meso @iwillbite dude, I was just thinking about this issue for my 400' long foundation I want to pour with future 1000' addition potential. I don't trust my friend's self leveling Chinese laser level for that long of a distance. I know I can just use a bunch of garden hoses with a clear tube on each end. Levelness is pretty critical for really long lettuce raft beds.