I haven't seen it mentioned in this forum yet, but there is a great app to help in trimming a plane out. It is called "Trim App" and is available for both Android and iPhones (iPad too). Guides you through the trimming process based largely on Peter GOldsmith's article of a few years ago.

This is the iPhone link

https://itunes.apple.com/us/app/trim...635579978?mt=8

Just search for "Trim App"

Best 99 cents you can spend