11-in-1 calibration block (English / SAE)

11 tests on one calibration block.
Requires calipers to measure min/ max feature sizes for your printer. Recommended print fill is 5%.
Metric Version: http://www.thingiverse.com/thing:423263
Tests:
horizontal and vertical hole diameters
3-axis feature minimum feature width test
scaling accuracy (via 1/2'' x 1/2'' x 1/2'' cube cutout)
rounded feature minimum size
fillet minimum size
max tower height to diameter ratio
Max build hangover angle test (30 - 80 degrees)
minimum