3x3 spike for retraction testing —

Founded 3x3 spike for retraction testing models & stl files for printing
Video test files
Chuck Bryant
20mm Test Cube
bdcannon
Torture Chain Box
Shikyojojo
Angel Marvin
Dombi3D
5tiered overhang test
Stay At Home Bob
Vipy print test
Innovaland 3D
overhang4070
flackenstein