3x3 spike for retraction testing —

Founded 3x3 spike for retraction testing models & stl files for printing
First Layer X Test
Scarecrow
TPU Test Cube
wasabi317
Tolerance Test
KTechIndustries
Banjo Dinosaur head
framedworld
Bridge and overhang test
Marteinn - 3DP Iceland
Petrin Tower by TomasT
Prusa Research