I'm working on flattening one face of a 6' board by hand before feeding it to the thickness planer. Ultimately to be used as a table top glue up.
I'm using a 48" (4') level as a straight edge. There is light showing in the middle of the level. Using my calipers, zeroing for the height of the level, I get 0.05" as the greatest deviation from flat.
Would you guys keep moving iron or decide that the wood might well move more than this through the planer and call it flat enough to proceed?
By the way, just in case there is someone in this forum that doesn't know, flattening a face by hand is hard, sweaty work!