The top to my 13x48 cabinet is not flat. One corner is lower than the others. (34”) Measuring at each corner to the floor show 1/8 variance.
Plan of action?
Mark lines to the floor at 34” and draw out horizontal lines on the 4 sides that show the right level.
Belt sand to near the lines, and then flatten with a #8 jointer. (This is a 23” long hand plane)
Am I on the right track?