Review on Accurate Repeated Measurement Corners by Josh Cardoso

Works! But. Works best with a STANDARD band, but not as well with an internal FatMax band. However, as a long level it works well on a band like FatMax. FatMax tape doesn't bend well in corners, so you'll need to make a tool to add 2 inches for them. On a standard tape measure (about 5/8 inch wide) it does an excellent job measuring inside corners. FatMax doesn't really allow you to use a radius in the corner small enough for the inside dimension tool to work smoothly.