There existed a small cavity where the seat tops aligned with the seat extension. I wasn’t happy with how it lined up, so I taped off the area and filled it with thickened epoxy. On a few of the bulkheads, the top panel was a touch proud of the bulkhead. On others the alignment was spot on. Instead of planing the top panel (which has a beautiful smooth curve cut from the kit), I decided to shim the low areas. Here I used an epoxy stir stick. The thickness was perfect. Here I used a slim plywood piece about twice the thickness of the stir stick. After these cure, I’ll shape them to fit perfectly atop the bulkheads.