I found just the ticket for thin CA a couple years ago. Dave Brown products "CA applicator" disposable squeeze bulbs.
You keep the CA bottle in the freezer and only pull out a little each time. When the tip gets fouled with balsa dust, you just snip off the messed up part and keep going. If you need to get some thin CA into a very tight place, you stretch the tube between two pliers and it will pull down very thin - excellent for getting thin CA down into hinges. Also, the tube part is about 6" long - perfect for getting inside fuselages.
The best part is the incredible precision you can get to control the CA. The bulb and tube are transparent, so as you squeeze the bulb part, you can see the CA wicking down the tube towards the tip and you can literally deposit one tiny drop exactly where you need it. The tube is thin enough that if it tips over on your bench, the CA stays in the bulb end.
I'm not a salesman or sponsored, but just sharing something I think everyone should have on their bench. . .