new first layer calibration style square —

Founded new first layer calibration style square models & stl files for printing
Calibration cube
Davis543
Calibration Hamburger
Grossmiller
Square holder
Alberto
Square  Tool
Nickbaxter
PRUSAcube
V.S.
Oak Island TSquare
cncMaker1976
Square Tool
VG_ST_D
Square key
iz2rpn
Square Guard
Darrens Workshop
square cookie cutter
Louis Menke
Square key
PavelB
Square QuickConnect Mount
NathanMichaelMoore