It's surprisingly difficult to get everything square when you're working with wood. This is a must, along with a border square and some of those combination squares.
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review