HI
DRAW a center line down your leading edge stock-with a sanding block- sand from both sides to the line makeing the curve ,the sameyou can make a templet out of card board to be sure the curve is the same the full length of the LE,if you need a certain shape -a pointer edge will give a faster airfoila blunt edge will be a slower wing ( more air resistance ) you can use the line down the middle thing on the trailing edgestab elevator and rudder also26 years builing experience 20 flying RC a lot more than mostENJOY BEST REGARDS TONY