polypanels 2x2 square doubler —

Founded polypanels 2x2 square doubler models & stl files for printing
Trapezoid Door
michaelrodriguez2
2x1 Rectangle Door
michaelrodriguez2
I tried
Agenpront
90 Degree Clamping Square
DisruptivNation
RotatePanel
alfredomateus
Poly Panel gapless
mleitner0