Make Accurate Inside Measurements
Furnished content.
(from Popularwoodworking.com)
Every woodworker knows not to rely on inside measurements made with a tape measure. Instead, I use two steel rules with dimensions that run to the edges. I butt one rule at each end, so the graduations overlap. To calculate …Source
Read more here
edit: Woodworking/auto___make_accurate_inside_measurements.wikieditish...