Quick bed flatness and first layer extrusion quality test (255mm bed, compatible with X1 and P1)

A quick to print test of first layer extrusion quality across the entire print bed. Good way to evaluate bed flatness and calibrate first layer settings. The print is designed to be printed in a single extrusion width line, with circles on each end to aid with bed adhesion. This should make for an extremely quick print that's light on filament usage as well.