Re: Clinker lands - how much tolerance?
There is a jig which I'm afraid I'll struggle to describe, it's the Tom Hill jig I think .
A round batten ( long dowel ) is run on the lap point blow the bevel you are wanting to cut. Take an old plane and drill a hole through it from side to side with the bottom of the hole the thickness of the dowel from the bottom of the plane . Thread a long bolt through the holes and run the smooth section of the bolt on the dowel while planing the bevel .
That description was positively opaque! Sorry . Perhaps someone with better descriptive skills will turn up and offer a better explanation . If you have access to old copies of WB look here.Beveling, planks: plywood lapstrake/for ultralight canoe/Tom Hill, 54:74
Perfect is the enemy of good.