Field math, exam prep, and working-plumber guides.
What's on the test, which code books you actually need, and an honest breakdown of the four main ways people prep. 383 questions, 16 modules, $174.99 lifetime.
A field guide to the math behind 45°, 22.5°, and 60° offsets, plus rolling offsets and transitions. Formulas with real examples, fitting takeoffs explained, and where apprentices get it wrong.