spla print parameter test and config file improved —

Founded spla print parameter test and config file improved models & stl files for printing
Print in place Chain
Dave3dDesign
Spiral Vase
ThPolitto
Print In Place V8Engine
Turbo_SunShine
Print in Place Inline3
Turbo_SunShine
Print In Place Inline4
Turbo_SunShine
black panther
maximzag