I mentioned that the slab has seen hard use. I wonder how much meat you have to cut to make a ½” trough in maple? On both sides, top and bottom. There is no such thing as a flat surface on this, flattening it (the other side!) was not a job for hand tools (I’m a sucker for punishment but not that much). The bottom photo shows the “pucks” in place, leveled and co-planer (referenced from the flat side). The grease has been attacked with de-greaser and scrapers followed by BLO. The knife cuts were left as battle scars of a hard life.