Sorry, guess my run-on paragraph wasn't too clear on this in the first thread but I tried to suggest useing Illustrator to do the same thing. If you don't have a vector supported drawing program you can draw your arch on the cross-section within the spline modeler with the pen tools. You would have to set-up the spline object to be the same propotions as your drawing to minimize distortion. Just start with a simple horizontal box, ungroup it and add 3 control points at the base, One for either side of the arch and one curved hanle one in the center which you would drag up to approximate position. This is not the best method but for a simple shape like this you could get it to fit pretty good. You can adjust the curves as needed and see a real-time update in your previw window.