The two top boards are almost 2′ wide, which is much bigger than my machinery. So, I pulled out a few hand tools and got to work. I used an old #6 Stanley hand plane with a very camabered blade, a new Lie-Nielsen #7 and even a belt sander.
I’d mostly use the Stanley #6 across the grain, taking very thick shavings to quickly remove material on the boards. Winding sticks and a straight edge check progress.
The belt sander was used on knotty areas where the hand plane was really tearing out.
The Lie-Nielsen #7 was set for thinner shavings and used diagonally and with the grain as the final passes.