What method do you guys prefer for checking the CG on your birds? I'm been doing it by hand ever since I got into this hobby, but I've come to the conclusion that there is probably +/- 1/4" to 1/2" margin of error in each direction. I've seen ads for special devices that you can buy and I've also heard that many people make their own with dowel rods and pencil erasers.

Give me some tips on the best ways to measure CG, and maybe some links to the devices you guys use. Thanks a bunch.

-coo