functional spring w built in support in the file works with pla —

Founded functional spring w built in support in the file works with pla models & stl files for printing
GPL plug
jmvspeleo
Fanduct
EDO
varioline fingers
luigi20000
Bathroom sink
Rolandir
Bookmark
SHR3D.eu
Maltese dog
SHR3D.eu
gold retriever
SHR3D.eu
Olaf
SHR3D.eu
Bacteriophage  T4 Virus
Alvaro Makergal