Sprue a helper for small parts

See install section for additional notes.

Sprue 1 & 2 are nearly identical. 2 uses the new formula, so it is rotated correctly. 3 bypasses the problem I was having with Makerware. 4 is set so that if you scale down by a factor of 10, there should be only 1 layer.

If you are like me, you print lots of small parts all at once. However, when one breaks away, you have to clear the plate, and start over.

Sprue was designed as a type of rafting, that was meant not as a raft, but as a model