Understanding True, Plumb, Square and 2 other handy principals.

Whether you are an Apprentice, DIY, Reno God, Furniture Artist. These principles will get things where they need to be. Build on Legends.

[generessler]

I think you meant _principles_ rather than principals, but maybe it's different down under.

[NrOx]

I call it Straight plumb square and plane. But it's the same everywhere! A Carpenter who has learned in China can go to another country and build there! The foundational principles are all the same!