Here are the one's that I use.

http://horizon.hobbyshopnow.com/prod...sp?prod=NHP217

By only removing the glue from the bottle rather than capping it, I find that the smaller amount is easier to handle. Light pressure on the bulb is all that is needed to get small drops to come out. I also hold the tip of the applicator about 1/8" away from the balsa surface and let it drip. If you place it right on the surface, it has a tendency to draw out of the applicator and can dump a lot all at once. The stuff will run anyway, so the drip method works much better in the long run.