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[http://technocraticanarchist.blogspot.com/2009_12_01_archive.html Aprons (extra bits around the edge) to reduce warping of big pieces; and plastic power grinders for hoppers; and other good ideas]<br />
[http://reprap.be/aggregator/sources/4?page=27 RepRap Aggregator]<br />
=== CAD Programs (for model generation) ===