When gluing Puglisi-style post eyes on flies generally I use his method and use cautrery or a soldering iron to burn a little hole in the fibers then use a bodkin to slice a little ball of glue from the tip of the ZAP GOO II, placing it in the hole and spinning the bodkin while pulling it away to leave a nice clean little glue-ball in the hole for the eye. With Puglisi fibers, Congo Hair, and similar material this technique works great.
Lately I have been tying some baitfish patterns that have flash heads. I have noticed while using the above method to apply the glue has problems when trying to cleanly remove the bodkin from the flash without dragging a bunch of the flash around, making a mess. It is not too big of a deal, but if you are anal like me about finishing your flies then you may appreciate this.
I went to a medical supply store down the street and bought a plastic syringe for $1.50 and filed it with ZAP GOO. It works awesome for applying the perfect amount of glue, right where you want it without disturbing the flash fibers.
A slight hesitation before pulling the syringe away will help keep the GOO from stringing.
I have also found that if you wipe the tip of the syringe with a paper towel between applications it helps keep everything clean.
[Update] If you leave a little GOO poking out of the tip of the syringe, it dries and keeps all the rest of the glue nice and uncured. It is easy to pick off when you need to GOO again.
Also cutting off the threaded sheath around the tip with a razor makes it a little less cumbersome.