i tried out the updated scripts. its looking good. the reason your curve is a little lumpy is because the very first and last points that you are using are for the creation of the leading and trailing edge circles. so there are a total of four points there for reference. the rest of the points are the ones you want to use for curve fitting the airfoil shape.

i have a question about installing your script. how do you get the narrow script to work. i copied all the files into the commands folder, but when it starts it is the wider version being used. likewise, how do you go about stalling the curve version as opposed to the other version of the javascript.