hi brian,

i like what you got. its a little better than what i did. the only thing i changed form what you have now is removing the points from the le and te rails. the points are only needed on the 1/4 rail for reference. i also tried taking the curve off the 1/4 rail but that made it graphically hard to look at. so i ended up putting the curve back on the rail along with the points.

if you do go about mirroring the airfoil spline, would it be possible to join all four curves of the airfoil definition, so that it was one joined curve. if so, it would be reading to sweep, with no work.

great job.

anthony