On the left side - run a straight edge along the sill between B & C post and the bottom of the A post is inline. (ie no gap) On the right side - run a straight edge along the sill between B & C post and bottom of A post is 7mm in (ie a gap to the straight edge) Pic shows how it was done. On the left side I moved the A post outward as the line of the A post turned in a bit much. This picture is before an adjustment This is the other side which is a very slight turn in (still a smaller turn in than the left side which is in line with the sill) which puts the A post 7mm in from the line of the sill. Which is right? Should A post be inline?