Posted on May 14, 2014November 30, 2014 by Don Chamberlain Precision Machining Parts for New ER-1 Filter This short video shows how we precision machine the internal parts for our Endless River Filters. GreatWave Engineering uses the Shopbot CNC Router at the San Jose TechShop facility for this work. Post navigationPrevious post: Biohome is here!!Next post: Genki Koi 2014 Growout Contest