I am relining the sides of my driveway with full size 6x6's and my geometry is a little rusty. The first cut is a 60 degree angle going from top to bottom (first pic) in each piece which works as long as the run is straight. My problem is when the run changes direction (second pic). The cuts come out like a 'rhombus'(I think that is the term) and the 2 pieces don't match. I am getting the feeling that this has no solution. Any ideas??