RC Glider Wings

Can anyone help me with the design of a rc glider wing? I imported a comma delimited file of airfoil coordinates, I then copied the curve, moved it about 20 inches from the original curve, scaled the copied curve, then lofted the curves to make the wing. This created a tapered wing with a flat or 90 degree end tip to the airfoil, a plank wing. I would like to make the wing tip rounded and curved as the new high performance gliders have. Thanks in advance for any help.

I might start here: How to make tip wings

There is a freeform video link that that may help.

This is also an interesting discussion on rounded tips: Modeling the tip of a cone-shaped tip