I realize I misspoke Anyway to correct the mistake For every 12 inches your run travels You rise 6in

Thanks for posting this video. I've never seen anyone else provide the information you have. There's just one technical weakness with this tool that you haven't touched upon. If you were attempting to use it on a hip roof rafter, you'd have a problem. The bird's mouth setting doesn't take height above plate into consideration. Certainly, it could be used in "work around" mode to get the job done, but it wouldn't be as easy to use as it is on common rafters. It's an important point to remember!

Awesome video. The squangle makes that birds mouth cut a lot simpler.

Thanks for video I found one of these and was wondering about it’s uses

I could be wrong but I thought for a 6/12 pitch every 12" of horizontal travel the roof rises 6"