Log processor plans are available for purchase at GizmoPlans.com and MillersWoodcutting.com, as of 2015. The plans range in price from $24.95 for a PDF download to $32 for a mailed CD.
The processor plan at GizmoPlans.com is for a hydraulic machine that is 13 feet long and cuts 20-inch-diameter logs. The machine can produce a cord of firewood in about three hours. The plan available at MillersWoodcutting.com includes over 70 photos and 14 diagrams to guide the builder. This plan includes a list of suppliers for the components needed to build the machine. Sample pages are included on the website.