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					Originally Posted by  9W Monighan
					 
				 
				What software is this? 
			
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 The free stuff, autodesk123 design. I'm not too knowledgable with this stuff but from what I've found it works to an extent. From what I researched most are making a extrusion for treads on a different layer but with this I can't do that so I used the circular pattern and just increased the number till treds looked full.