Sprue Test
thingiverse
This little file helps you figure out how big the sprues should be on a laser cut item for different types of materials This and all my items can be found on my blog http://msraynsford.blogspot.co.uk/ Instructions Just cut the shape and decide which thickness of sprue is most suitable for your materials.
Download Model from thingiverse
With this file you will be able to print Sprue Test with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Sprue Test.