Just my opinion...
Get rid of the brush. Capillary action will work, allright; it'll pull your CA all the way to the ferrule, and after it dries, you'll never get it out. Try this: Get a paper clip, sewing needle, or straight pin. Cut it so that it's an inch or two long, then chuck it into an X-acto knife handle. Instant applicator. The nice thing about this method is that you can now place minimal amounts in tight locations without having to worry about glue runs, drips, or puddles where you don't want it. Clean-up is a snap. When the glue starts to accumulate on the tip, you can scrape it off easily with a knife blade, or simply change to another pin, needle, etc.
Gip Winecoff