Many a time, we often have to add a lot of lead weights to the front of our gliders to get the correct CG. An alternative and quick method to casting your own lead is to buy fishing weights that are of the correct shape to fit the front of fuselage.
A wide range of shape and sizes are available from fishing shops. One good place to get them locally in Singapore is at Joe's Tackle at Beach road. They come in different shape and sizes. The ball and bullet shape ones will fit our glider fuselage very nicely. Cut away any hooks and use blue tack to stick them in. Fill up the gaps with smaller lead shots.
They fit nicely into ballast tube as well