new first layer calibration style square —

Founded new first layer calibration style square models & stl files for printing
90 Degree Clamping Square
DisruptivNation
Stick tower
JustinSDK
Empire Chest
Sh4d0wFl4r3
Star
Nelas
The Eraser
depojunk
A Square Support
byoungster
Coasters
3DPrinterMaster66