Bed calibration tile

Hey'o

Just a 5000x5000x200µm tile (5x5x0.2mm) for bed levelling and Z height calibration.

In your slicer program, set first layer to 0.2mm, just stick one near each levelling screw (allowing for the skirting run), print, peel off with a sharpish thingy and measure with Vernier calipers.

For those without Vernier calipers, a visual guide:
If it doesn't extrude, you may have a clog, or you're too low.
If you see sharp convex ridges on the finish, you're a little too low.
If you see rou