I looked a little more, and the stock 9 board layout that was used through around mid-'51 had widths 4-1/4", 5", 5-1/2", 5-1/2", 6-3/8", 5-1/2", 5-1/2", 5", 4-1/4" in a progression from narrowest on the sides, widest in the middle. If you try to simply go real wide on the outside two to fill around the wide tubs and save the other boards it will not be as pleasing to the eye in my opinion. You're a woodworker, right Shine (think I recall some interior details you did)? Measure the width you need to just clear the tubs and let them sit flush on wood with the SS bar adjacent, then using that width balance the others into a nice seven or eight board layout that's symmetrical, maybe going narrower towards the middle? I agree, I would leave the tubs alone unless there's not another answer. They look too cool.