Re: Clinker lands - how much tolerance?
1/64 in 3/4 is perfectly acceptable in glued lapstrake but completely unacceptable in traditional lapstrake if you're building to a shipwright's standards. If you're building trad lap, it should be perfect. The secret is practice, and a really sharp plane.
I think Peerie is right that dory lap is more work to make yet less strong. I would save that only for the gains at the hood ends at most, unless you are really trying to be historically accurate in a specific replica. The near doubling of thickness at each lap effectively forms a structurally useful longitudinal stringer with standard lapstrake technique.
A -very- thin bead of Sikaflex 291 is probably fine, but shouldn't be used as a substitute for making a plank actually fit.
Amphibious Macroplankton Oughtredia doublendus
Mostly found frequenting the littoral and estuarine zones in the southern half of the Salish Sea, though sightings have been recorded both north and south of this area, and occasionally, but rarely, inland, in freshwater environments. This species lives on micro-brewed beer and dutch-oven biscuits,and displays brightly colored nylon and gore-tex plumage during the rainy season. Approach with caution!